25212464464 has 20 divisors (see below), whose sum is σ = 53289982080. Its totient is φ = 11460211040.

The previous prime is 25212464449. The next prime is 25212464569. The reversal of 25212464464 is 46446421252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71626144 + ... + 71626495.

It is an arithmetic number, because the mean of its divisors is an integer number (2664499104).

Almost surely, 2^25212464464 is an apocalyptic number.

It is an amenable number.

25212464464 is an abundant number, since it is smaller than the sum of its proper divisors (28077517616).

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

25212464464 is a wasteful number, since it uses less digits than its factorization.

25212464464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143252658 (or 143252652 counting only the distinct ones).

The product of its digits is 368640, while the sum is 40.

The spelling of 25212464464 in words is "twenty-five billion, two hundred twelve million, four hundred sixty-four thousand, four hundred sixty-four".