25531342788 has 36 divisors (see below), whose sum is σ = 69299360592. Its totient is φ = 7294669200.

The previous prime is 25531342769. The next prime is 25531342819. The reversal of 25531342788 is 88724313552.

It is a super-2 number, since 2×25531342788² (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 11 ways as a sum of consecutive naturals, for example, 21709738 + ... + 21710913.

Almost surely, 2^25531342788 is an apocalyptic number.

25531342788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25531342788 is an abundant number, since it is smaller than the sum of its proper divisors (43768017804).

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

25531342788 is a wasteful number, since it uses less digits than its factorization.

25531342788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43420672 (or 43420663 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The spelling of 25531342788 in words is "twenty-five billion, five hundred thirty-one million, three hundred forty-two thousand, seven hundred eighty-eight".