64168116925 has 24 divisors (see below), whose sum is σ = 86816979072. Its totient is φ = 46659648000.

The previous prime is 64168116919. The next prime is 64168116941. The reversal of 64168116925 is 52961186146.

It is a happy number.

It is not a de Polignac number, because 64168116925 - 2³ = 64168116917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1905837 + ... + 1939213.

It is an arithmetic number, because the mean of its divisors is an integer number (3617374128).

Almost surely, 2^64168116925 is an apocalyptic number.

It is an amenable number.

64168116925 is a deficient number, since it is larger than the sum of its proper divisors (22648862147).

64168116925 is a wasteful number, since it uses less digits than its factorization.

64168116925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40389 (or 40384 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The spelling of 64168116925 in words is "sixty-four billion, one hundred sixty-eight million, one hundred sixteen thousand, nine hundred twenty-five".