64168071957 has 12 divisors (see below), whose sum is σ = 101113325664. Its totient is φ = 38889740520.

The previous prime is 64168071941. The next prime is 64168071991. The reversal of 64168071957 is 75917086146.

It is not a de Polignac number, because 64168071957 - 2⁴ = 64168071941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64168078957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324081073 + ... + 324081270.

It is an arithmetic number, because the mean of its divisors is an integer number (8426110472).

Almost surely, 2^64168071957 is an apocalyptic number.

It is an amenable number.

64168071957 is a deficient number, since it is larger than the sum of its proper divisors (36945253707).

64168071957 is a wasteful number, since it uses less digits than its factorization.

64168071957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648162360 (or 648162357 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 64168071957 in words is "sixty-four billion, one hundred sixty-eight million, seventy-one thousand, nine hundred fifty-seven".