25387929892 has 96 divisors (see below), whose sum is σ = 49648454240. Its totient is φ = 11287019520.

The previous prime is 25387929877. The next prime is 25387929913. The reversal of 25387929892 is 29892978352.

It can be written as a sum of positive squares in 16 ways, for example, as 11919398976 + 13468530916 = 109176^2 + 116054^2 .

It is a super-2 number, since 2×25387929892² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33537178 + ... + 33537934.

Almost surely, 2^25387929892 is an apocalyptic number.

It is an amenable number.

25387929892 is a deficient number, since it is larger than the sum of its proper divisors (24260524348).

25387929892 is a wasteful number, since it uses less digits than its factorization.

25387929892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1039 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 64.

The spelling of 25387929892 in words is "twenty-five billion, three hundred eighty-seven million, nine hundred twenty-nine thousand, eight hundred ninety-two".