2522456640 has 392 divisors, whose sum is σ = 9834481728. Its totient is φ = 610882560.

The previous prime is 2522456603. The next prime is 2522456731. The reversal of 2522456640 is 466542252.

2522456640 is a `hidden beast` number, since 2 + 5 + 2 + 2 + 4 + 5 + 6 + 640 = 666.

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 = 2522456595 and 2522456604.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2565589 + ... + 2566571.

Almost surely, 2^2522456640 is an apocalyptic number.

2522456640 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 2522456640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4917240864).

2522456640 is an abundant number, since it is smaller than the sum of its proper divisors (7312025088).

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

2522456640 is an equidigital number, since it uses as much as digits as its factorization.

2522456640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 2522456640 is about 50224.0643516631. The cubic root of 2522456640 is about 1361.2604807608.

Adding to 2522456640 its reverse (466542252), we get a palindrome (2988998892).

The spelling of 2522456640 in words is "two billion, five hundred twenty-two million, four hundred fifty-six thousand, six hundred forty".