812749139162 has 32 divisors (see below), whose sum is σ = 1283012628480. Its totient is φ = 385386018160.

The previous prime is 812749139161. The next prime is 812749139179. The reversal of 812749139162 is 261931947218.

It is a super-2 number, since 2×812749139162² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812749139161) 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, 6585539 + ... + 6707817.

It is an arithmetic number, because the mean of its divisors is an integer number (40094144640).

Almost surely, 2^812749139162 is an apocalyptic number.

812749139162 is a deficient number, since it is larger than the sum of its proper divisors (470263489318).

812749139162 is a wasteful number, since it uses less digits than its factorization.

812749139162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123538.

The product of its digits is 1306368, while the sum is 53.

The spelling of 812749139162 in words is "eight hundred twelve billion, seven hundred forty-nine million, one hundred thirty-nine thousand, one hundred sixty-two".