2525930640 has 120 divisors (see below), whose sum is σ = 8518701048. Its totient is φ = 670740480.

The previous prime is 2525930629. The next prime is 2525930647. The reversal of 2525930640 is 460395252.

2525930640 is a `hidden beast` number, since 2 + 5 + 2 + 5 + 9 + 3 + 0 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 176783616 + 2349147024 = 13296^2 + 48468^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 = 2525930595 and 2525930604.

It is not an unprimeable number, because it can be changed into a prime (2525930647) by changing a digit.

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, 166242 + ... + 180798.

Almost surely, 2^2525930640 is an apocalyptic number.

2525930640 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 2525930640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4259350524).

2525930640 is an abundant number, since it is smaller than the sum of its proper divisors (5992770408).

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

2525930640 is a wasteful number, since it uses less digits than its factorization.

2525930640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14817 (or 14808 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 2525930640 is about 50258.6374666087. The cubic root of 2525930640 is about 1361.8851164849.

The spelling of 2525930640 in words is "two billion, five hundred twenty-five million, nine hundred thirty thousand, six hundred forty".