25565406235064 has 128 divisors (see below), whose sum is σ = 54473740738560. Its totient is φ = 11190131140608.

The previous prime is 25565406235049. The next prime is 25565406235091. The reversal of 25565406235064 is 46053260456552.

It is a junction number, because it is equal to n+sod(n) for n = 25565406234997 and 25565406235015.

It is a congruent number.

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, 8912729 + ... + 11426615.

It is an arithmetic number, because the mean of its divisors is an integer number (425576099520).

Almost surely, 2^{25565406235064} is an apocalyptic number.

It is an amenable number.

25565406235064 is an abundant number, since it is smaller than the sum of its proper divisors (28908334503496).

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

25565406235064 is a wasteful number, since it uses less digits than its factorization.

25565406235064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514037 (or 2514033 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 53.

The spelling of 25565406235064 in words is "twenty-five trillion, five hundred sixty-five billion, four hundred six million, two hundred thirty-five thousand, sixty-four".