25645432572 has 24 divisors (see below), whose sum is σ = 66488158800. Its totient is φ = 8548477488.

The previous prime is 25645432543. The next prime is 25645432573. The reversal of 25645432572 is 27523454652.

25645432572 is a `hidden beast` number, since 2 + 5 + 6 + 45 + 4 + 32 + 572 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645432573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118728747 + ... + 118728962.

It is an arithmetic number, because the mean of its divisors is an integer number (2770339950).

Almost surely, 2^25645432572 is an apocalyptic number.

It is an amenable number.

25645432572 is an abundant number, since it is smaller than the sum of its proper divisors (40842726228).

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

25645432572 is a wasteful number, since it uses less digits than its factorization.

25645432572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237457722 (or 237457714 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 45.

The spelling of 25645432572 in words is "twenty-five billion, six hundred forty-five million, four hundred thirty-two thousand, five hundred seventy-two".