81264965934 has 32 divisors (see below), whose sum is σ = 167790468096. Its totient is φ = 26211749760.

The previous prime is 81264965909. The next prime is 81264965953. The reversal of 81264965934 is 43956946218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2486769 + ... + 2519235.

It is an arithmetic number, because the mean of its divisors is an integer number (5243452128).

Almost surely, 2^81264965934 is an apocalyptic number.

81264965934 is an abundant number, since it is smaller than the sum of its proper divisors (86525502162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81264965934 is a wasteful number, since it uses less digits than its factorization.

81264965934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45960.

The product of its digits is 11197440, while the sum is 57.

The spelling of 81264965934 in words is "eighty-one billion, two hundred sixty-four million, nine hundred sixty-five thousand, nine hundred thirty-four".