25791613020 has 72 divisors (see below), whose sum is σ = 78361286640. Its totient is φ = 6866622720.

The previous prime is 25791612961. The next prime is 25791613049. The reversal of 25791613020 is 2031619752.

25791613020 is a `hidden beast` number, since 2 + 579 + 1 + 61 + 3 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4321 + ... + 227160.

Almost surely, 2^25791613020 is an apocalyptic number.

25791613020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25791613020 is an abundant number, since it is smaller than the sum of its proper divisors (52569673620).

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

25791613020 is a wasteful number, since it uses less digits than its factorization.

25791613020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232115 (or 232110 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 25791613020 in words is "twenty-five billion, seven hundred ninety-one million, six hundred thirteen thousand, twenty".