25351427172 has 48 divisors (see below), whose sum is σ = 63230735232. Its totient is φ = 7885912320.

The previous prime is 25351427161. The next prime is 25351427177. The reversal of 25351427172 is 27172415352.

It is a self number, because there is not a number n which added to its sum of digits gives 25351427172.

It is not an unprimeable number, because it can be changed into a prime (25351427177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108843 + ... + 1131474.

It is an arithmetic number, because the mean of its divisors is an integer number (1317306984).

Almost surely, 2^25351427172 is an apocalyptic number.

It is an amenable number.

25351427172 is an abundant number, since it is smaller than the sum of its proper divisors (37879308060).

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

25351427172 is a wasteful number, since it uses less digits than its factorization.

25351427172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240388 (or 2240386 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The spelling of 25351427172 in words is "twenty-five billion, three hundred fifty-one million, four hundred twenty-seven thousand, one hundred seventy-two".