25616672720 has 80 divisors (see below), whose sum is σ = 60775038720. Its totient is φ = 10039411200.

The previous prime is 25616672701. The next prime is 25616672737. The reversal of 25616672720 is 2727661652.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812450 + ... + 843390.

It is an arithmetic number, because the mean of its divisors is an integer number (759687984).

Almost surely, 2^25616672720 is an apocalyptic number.

25616672720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25616672720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30387519360).

25616672720 is an abundant number, since it is smaller than the sum of its proper divisors (35158366000).

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

25616672720 is a wasteful number, since it uses less digits than its factorization.

25616672720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31164 (or 31158 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 25616672720 in words is "twenty-five billion, six hundred sixteen million, six hundred seventy-two thousand, seven hundred twenty".