25525557500 has 30 divisors (see below), whose sum is σ = 55819294608. Its totient is φ = 10210222000.

The previous prime is 25525557439. The next prime is 25525557503. The reversal of 25525557500 is 575552552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525557503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5102612 + ... + 5107611.

Almost surely, 2^25525557500 is an apocalyptic number.

25525557500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25525557500 is an abundant number, since it is smaller than the sum of its proper divisors (30293737108).

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

25525557500 is a wasteful number, since it uses less digits than its factorization.

25525557500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210247 (or 10210230 counting only the distinct ones).

The product of its (nonzero) digits is 437500, while the sum is 41.

The spelling of 25525557500 in words is "twenty-five billion, five hundred twenty-five million, five hundred fifty-seven thousand, five hundred".