64334971597 has 4 divisors (see below), whose sum is σ = 69283815580. Its totient is φ = 59386127616.

The previous prime is 64334971579. The next prime is 64334971639. The reversal of 64334971597 is 79517943346.

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 32828366596 + 31506605001 = 181186^2 + 177501^2 .

It is a cyclic number.

It is not a de Polignac number, because 64334971597 - 2¹¹ = 64334969549 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 (64334971097) 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, 2474421972 + ... + 2474421997.

It is an arithmetic number, because the mean of its divisors is an integer number (17320953895).

Almost surely, 2^64334971597 is an apocalyptic number.

It is an amenable number.

64334971597 is a deficient number, since it is larger than the sum of its proper divisors (4948843983).

64334971597 is a wasteful number, since it uses less digits than its factorization.

64334971597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4948843982.

The product of its digits is 17146080, while the sum is 58.

The spelling of 64334971597 in words is "sixty-four billion, three hundred thirty-four million, nine hundred seventy-one thousand, five hundred ninety-seven".