25977575500 has 48 divisors (see below), whose sum is σ = 56857024224. Its totient is φ = 10368686400.

The previous prime is 25977575479. The next prime is 25977575521. The reversal of 25977575500 is 557577952.

It is an interprime number because it is at equal distance from previous prime (25977575479) and next prime (25977575521).

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 15 ways as a sum of consecutive naturals, for example, 177874 + ... + 289126.

It is an arithmetic number, because the mean of its divisors is an integer number (1184521338).

Almost surely, 2^25977575500 is an apocalyptic number.

25977575500 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 25977575500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28428512112).

25977575500 is an abundant number, since it is smaller than the sum of its proper divisors (30879448724).

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

25977575500 is a wasteful number, since it uses less digits than its factorization.

25977575500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111739 (or 111727 counting only the distinct ones).

The product of its (nonzero) digits is 3858750, while the sum is 52.

The spelling of 25977575500 in words is "twenty-five billion, nine hundred seventy-seven million, five hundred seventy-five thousand, five hundred".