25700519664 has 60 divisors (see below), whose sum is σ = 74405970600. Its totient is φ = 8271430272.

The previous prime is 25700519659. The next prime is 25700519681. The reversal of 25700519664 is 46691500752.

25700519664 is a `hidden beast` number, since 2 + 5 + 70 + 0 + 519 + 6 + 64 = 666.

It is a congruent number.

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, 3072994 + ... + 3081345.

It is an arithmetic number, because the mean of its divisors is an integer number (1240099510).

Almost surely, 2^25700519664 is an apocalyptic number.

25700519664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25700519664 is an abundant number, since it is smaller than the sum of its proper divisors (48705450936).

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

25700519664 is a wasteful number, since it uses less digits than its factorization.

25700519664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6154382 (or 6154373 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 25700519664 in words is "twenty-five billion, seven hundred million, five hundred nineteen thousand, six hundred sixty-four".