25528872720 has 160 divisors (see below), whose sum is σ = 89713008000. Its totient is φ = 5953277952.

The previous prime is 25528872709. The next prime is 25528872731. The reversal of 25528872720 is 2727882552.

It is an interprime number because it is at equal distance from previous prime (25528872709) and next prime (25528872731).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25528872720.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156045 + ... + 274604.

It is an arithmetic number, because the mean of its divisors is an integer number (560706300).

Almost surely, 2^25528872720 is an apocalyptic number.

25528872720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25528872720 is an abundant number, since it is smaller than the sum of its proper divisors (64184135280).

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

25528872720 is a wasteful number, since it uses less digits than its factorization.

25528872720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430697 (or 430691 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 48.

The spelling of 25528872720 in words is "twenty-five billion, five hundred twenty-eight million, eight hundred seventy-two thousand, seven hundred twenty".