64913292191 has 16 divisors (see below), whose sum is σ = 72989185536. Its totient is φ = 57227100000.

The previous prime is 64913292161. The next prime is 64913292229. The reversal of 64913292191 is 19129231946.

It is a cyclic number.

It is not a de Polignac number, because 64913292191 - 2¹⁰ = 64913291167 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 (64913292161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633635 + ... + 728916.

It is an arithmetic number, because the mean of its divisors is an integer number (4561824096).

Almost surely, 2^64913292191 is an apocalyptic number.

64913292191 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

64913292191 is a deficient number, since it is larger than the sum of its proper divisors (8075893345).

64913292191 is a wasteful number, since it uses less digits than its factorization.

64913292191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362694.

The product of its digits is 209952, while the sum is 47.

The spelling of 64913292191 in words is "sixty-four billion, nine hundred thirteen million, two hundred ninety-two thousand, one hundred ninety-one".