25451332572 has 12 divisors (see below), whose sum is σ = 59386442696. Its totient is φ = 8483777520.

The previous prime is 25451332531. The next prime is 25451332589. The reversal of 25451332572 is 27523315452.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25451332572.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060472179 + ... + 1060472202.

Almost surely, 2^25451332572 is an apocalyptic number.

It is an amenable number.

25451332572 is an abundant number, since it is smaller than the sum of its proper divisors (33935110124).

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

25451332572 is a wasteful number, since it uses less digits than its factorization.

25451332572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120944388 (or 2120944386 counting only the distinct ones).

The product of its digits is 252000, while the sum is 39.

The spelling of 25451332572 in words is "twenty-five billion, four hundred fifty-one million, three hundred thirty-two thousand, five hundred seventy-two".