2525638860 has 96 divisors (see below), whose sum is σ = 7868474880. Its totient is φ = 672566976.

The previous prime is 2525638853. The next prime is 2525638873. The reversal of 2525638860 is 688365252.

2525638860 is a `hidden beast` number, since 2 + 5 + 2 + 5 + 638 + 8 + 6 + 0 = 666.

It is a super-2 number, since 2×2525638860² = 12757703302284199200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 31 ways as a sum of consecutive naturals, for example, 441579 + ... + 447261.

It is an arithmetic number, because the mean of its divisors is an integer number (81963280).

Almost surely, 2^2525638860 is an apocalyptic number.

2525638860 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 2525638860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3934237440).

2525638860 is an abundant number, since it is smaller than the sum of its proper divisors (5342836020).

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

2525638860 is a wasteful number, since it uses less digits than its factorization.

2525638860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524 (or 6516 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 2525638860 is about 50255.7345981531. The cubic root of 2525638860 is about 1361.8326755964.

The spelling of 2525638860 in words is "two billion, five hundred twenty-five million, six hundred thirty-eight thousand, eight hundred sixty".