64901957 has 4 divisors (see below), whose sum is σ = 65065836. Its totient is φ = 64738080.

The previous prime is 64901939. The next prime is 64901981. The reversal of 64901957 is 75910946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52504516 + 12397441 = 7246^2 + 3521^2 .

It is a cyclic number.

It is not a de Polignac number, because 64901957 - 2¹⁰ = 64900933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64901857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81344 + ... + 82137.

It is an arithmetic number, because the mean of its divisors is an integer number (16266459).

Almost surely, 2^64901957 is an apocalyptic number.

It is an amenable number.

64901957 is a deficient number, since it is larger than the sum of its proper divisors (163879).

64901957 is a wasteful number, since it uses less digits than its factorization.

64901957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163878.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 64901957 is about 8056.1750849892. The cubic root of 64901957 is about 401.8703182274.

The spelling of 64901957 in words is "sixty-four million, nine hundred one thousand, nine hundred fifty-seven".