25897885516 has 12 divisors (see below), whose sum is σ = 45331101760. Its totient is φ = 12946142160.

The previous prime is 25897885513. The next prime is 25897885537. The reversal of 25897885516 is 61558879852.

It is not an unprimeable number, because it can be changed into a prime (25897885513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 679275 + ... + 716386.

Almost surely, 2^25897885516 is an apocalyptic number.

It is an amenable number.

25897885516 is a deficient number, since it is larger than the sum of its proper divisors (19433216244).

25897885516 is a wasteful number, since it uses less digits than its factorization.

25897885516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400304 (or 1400302 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 64.

The spelling of 25897885516 in words is "twenty-five billion, eight hundred ninety-seven million, eight hundred eighty-five thousand, five hundred sixteen".