25657013406 has 64 divisors (see below), whose sum is σ = 55220797440. Its totient is φ = 7928400480.

The previous prime is 25657013399. The next prime is 25657013407. The reversal of 25657013406 is 60431075652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25657013407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 555891 + ... + 600273.

It is an arithmetic number, because the mean of its divisors is an integer number (862824960).

Almost surely, 2^25657013406 is an apocalyptic number.

25657013406 is an abundant number, since it is smaller than the sum of its proper divisors (29563784034).

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

25657013406 is a wasteful number, since it uses less digits than its factorization.

25657013406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44541.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 25657013406 in words is "twenty-five billion, six hundred fifty-seven million, thirteen thousand, four hundred six".