25538117000 has 64 divisors (see below), whose sum is σ = 65191875840. Its totient is φ = 9286584000.

The previous prime is 25538116993. The next prime is 25538117021. The reversal of 25538117000 is 71183552.

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 15 ways as a sum of consecutive naturals, for example, 1149824 + ... + 1171823.

It is an arithmetic number, because the mean of its divisors is an integer number (1018623060).

Almost surely, 2^25538117000 is an apocalyptic number.

25538117000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25538117000 is an abundant number, since it is smaller than the sum of its proper divisors (39653758840).

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

25538117000 is a wasteful number, since it uses less digits than its factorization.

25538117000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321679 (or 2321665 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 25538117000 in words is "twenty-five billion, five hundred thirty-eight million, one hundred seventeen thousand".