25709002920 has 48 divisors (see below), whose sum is σ = 83554260660. Its totient is φ = 6855734016.

The previous prime is 25709002903. The next prime is 25709002933. The reversal of 25709002920 is 2920090752.

It can be written as a sum of positive squares in 2 ways, for example, as 25562253924 + 146748996 = 159882^2 + 12114^2 .

It is a super-2 number, since 2×25709002920² (a number of 22 digits) contains 22 as substring.

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

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, 35706589 + ... + 35707308.

Almost surely, 2^25709002920 is an apocalyptic number.

25709002920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25709002920 is an abundant number, since it is smaller than the sum of its proper divisors (57845257740).

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

25709002920 is a wasteful number, since it uses less digits than its factorization.

25709002920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71413914 (or 71413907 counting only the distinct ones).

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

The spelling of 25709002920 in words is "twenty-five billion, seven hundred nine million, two thousand, nine hundred twenty".