25057864500 has 96 divisors (see below), whose sum is σ = 73721182080. Its totient is φ = 6613171200.

The previous prime is 25057864421. The next prime is 25057864519. The reversal of 25057864500 is 546875052.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59391 + ... + 231609.

It is an arithmetic number, because the mean of its divisors is an integer number (767928980).

Almost surely, 2^25057864500 is an apocalyptic number.

25057864500 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 25057864500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36860591040).

25057864500 is an abundant number, since it is smaller than the sum of its proper divisors (48663317580).

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

25057864500 is a wasteful number, since it uses less digits than its factorization.

25057864500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172338 (or 172326 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 25057864500 in words is "twenty-five billion, fifty-seven million, eight hundred sixty-four thousand, five hundred".