64431022161 has 32 divisors (see below), whose sum is σ = 95533240320. Its totient is φ = 38299248000.

The previous prime is 64431022129. The next prime is 64431022169. The reversal of 64431022161 is 16122013446.

It is not a de Polignac number, because 64431022161 - 2⁵ = 64431022129 is a prime.

It is a super-2 number, since 2×64431022161² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64431022169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311821 + ... + 475493.

It is an arithmetic number, because the mean of its divisors is an integer number (2985413760).

Almost surely, 2^64431022161 is an apocalyptic number.

It is an amenable number.

64431022161 is a deficient number, since it is larger than the sum of its proper divisors (31102218159).

64431022161 is a wasteful number, since it uses less digits than its factorization.

64431022161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163917.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 64431022161 in words is "sixty-four billion, four hundred thirty-one million, twenty-two thousand, one hundred sixty-one".