64172390925 has 48 divisors (see below), whose sum is σ = 112673538432. Its totient is φ = 32116224000.

The previous prime is 64172390881. The next prime is 64172390951. The reversal of 64172390925 is 52909327146.

It is not a de Polignac number, because 64172390925 - 2¹¹ = 64172388877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 355000 + ... + 504350.

It is an arithmetic number, because the mean of its divisors is an integer number (2347365384).

Almost surely, 2^64172390925 is an apocalyptic number.

It is an amenable number.

64172390925 is a deficient number, since it is larger than the sum of its proper divisors (48501147507).

64172390925 is a wasteful number, since it uses less digits than its factorization.

64172390925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149718 (or 149713 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The spelling of 64172390925 in words is "sixty-four billion, one hundred seventy-two million, three hundred ninety thousand, nine hundred twenty-five".