64013869691 has 2 divisors, whose sum is σ = 64013869692. Its totient is φ = 64013869690.

The previous prime is 64013869679. The next prime is 64013869727. The reversal of 64013869691 is 19696831046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64013869691 - 2³⁰ = 62940127867 is a prime.

It is not a weakly prime, because it can be changed into another prime (64010869691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32006934845 + 32006934846.

It is an arithmetic number, because the mean of its divisors is an integer number (32006934846).

Almost surely, 2^64013869691 is an apocalyptic number.

64013869691 is a deficient number, since it is larger than the sum of its proper divisors (1).

64013869691 is an equidigital number, since it uses as much as digits as its factorization.

64013869691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 64013869691 in words is "sixty-four billion, thirteen million, eight hundred sixty-nine thousand, six hundred ninety-one".