25290612040 has 64 divisors (see below), whose sum is σ = 57139311600. Its totient is φ = 10074488832.

The previous prime is 25290612031. The next prime is 25290612041. The reversal of 25290612040 is 4021609252.

It can be written as a sum of positive squares in 8 ways, for example, as 1184323396 + 24106288644 = 34414^2 + 155262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25290611993 and 25290612011.

It is not an unprimeable number, because it can be changed into a prime (25290612041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13387416 + ... + 13389304.

Almost surely, 2^25290612040 is an apocalyptic number.

25290612040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25290612040 is an abundant number, since it is smaller than the sum of its proper divisors (31848699560).

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

25290612040 is a wasteful number, since it uses less digits than its factorization.

25290612040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 25290612040 in words is "twenty-five billion, two hundred ninety million, six hundred twelve thousand, forty".