25757505500 has 24 divisors (see below), whose sum is σ = 56254393104. Its totient is φ = 10303002000.

The previous prime is 25757505497. The next prime is 25757505509. The reversal of 25757505500 is 550575752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25757505509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25757006 + ... + 25758005.

It is an arithmetic number, because the mean of its divisors is an integer number (2343933046).

Almost surely, 2^25757505500 is an apocalyptic number.

25757505500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25757505500 is an abundant number, since it is smaller than the sum of its proper divisors (30496887604).

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

25757505500 is a wasteful number, since it uses less digits than its factorization.

25757505500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51515030 (or 51515018 counting only the distinct ones).

The product of its (nonzero) digits is 306250, while the sum is 41.

The spelling of 25757505500 in words is "twenty-five billion, seven hundred fifty-seven million, five hundred five thousand, five hundred".