64172877931065 has 32 divisors (see below), whose sum is σ = 106538778541440. Its totient is φ = 32957216077824.

The previous prime is 64172877931049. The next prime is 64172877931073. The reversal of 64172877931065 is 56013977827146.

It is not a de Polignac number, because 64172877931065 - 2⁴ = 64172877931049 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64172877930987 and 64172877931005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 595960635 + ... + 596068304.

It is an arithmetic number, because the mean of its divisors is an integer number (3329336829420).

It is a 1-persistent number, because it is pandigital, but 2⋅64172877931065 = 128345755862130 is not.

Almost surely, 2^{64172877931065} is an apocalyptic number.

It is an amenable number.

64172877931065 is a deficient number, since it is larger than the sum of its proper divisors (42365900610375).

64172877931065 is a wasteful number, since it uses less digits than its factorization.

64172877931065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192029081.

The product of its (nonzero) digits is 106686720, while the sum is 66.

The spelling of 64172877931065 in words is "sixty-four trillion, one hundred seventy-two billion, eight hundred seventy-seven million, nine hundred thirty-one thousand, sixty-five".