2522636640 has 144 divisors (see below), whose sum is σ = 8791892928. Its totient is φ = 658372608.

The previous prime is 2522636621. The next prime is 2522636657. The reversal of 2522636640 is 466362252.

2522636640 is a `hidden beast` number, since 2 + 5 + 2 + 2 + 6 + 3 + 6 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2522636595 and 2522636604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49044 + ... + 86316.

It is an arithmetic number, because the mean of its divisors is an integer number (61054812).

Almost surely, 2^2522636640 is an apocalyptic number.

2522636640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2522636640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4395946464).

2522636640 is an abundant number, since it is smaller than the sum of its proper divisors (6269256288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2522636640 is a wasteful number, since it uses less digits than its factorization.

2522636640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37341 (or 37330 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 2522636640 is about 50225.8562893655. The cubic root of 2522636640 is about 1361.2928593892.

Adding to 2522636640 its reverse (466362252), we get a palindrome (2988998892).

The spelling of 2522636640 in words is "two billion, five hundred twenty-two million, six hundred thirty-six thousand, six hundred forty".