64964591697 has 32 divisors (see below), whose sum is σ = 87699870720. Its totient is φ = 42774036480.

The previous prime is 64964591693. The next prime is 64964591701. The reversal of 64964591697 is 79619546946.

It is an interprime number because it is at equal distance from previous prime (64964591693) and next prime (64964591701).

It is not a de Polignac number, because 64964591697 - 2² = 64964591693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64964591693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84478929 + ... + 84479697.

It is an arithmetic number, because the mean of its divisors is an integer number (2740620960).

Almost surely, 2^64964591697 is an apocalyptic number.

It is an amenable number.

64964591697 is a deficient number, since it is larger than the sum of its proper divisors (22735279023).

64964591697 is a wasteful number, since it uses less digits than its factorization.

64964591697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its digits is 88179840, while the sum is 66.

The spelling of 64964591697 in words is "sixty-four billion, nine hundred sixty-four million, five hundred ninety-one thousand, six hundred ninety-seven".