845719797931 has 4 divisors (see below), whose sum is σ = 882490223952. Its totient is φ = 808949371912.

The previous prime is 845719797913. The next prime is 845719797941. The reversal of 845719797931 is 139797917548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 845719797931 - 2²⁹ = 845182927019 is a prime.

It is a super-2 number, since 2×845719797931² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845719797941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18385212976 + ... + 18385213021.

It is an arithmetic number, because the mean of its divisors is an integer number (220622555988).

Almost surely, 2^845719797931 is an apocalyptic number.

845719797931 is a deficient number, since it is larger than the sum of its proper divisors (36770426021).

845719797931 is a wasteful number, since it uses less digits than its factorization.

845719797931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36770426020.

The product of its digits is 120022560, while the sum is 70.

The spelling of 845719797931 in words is "eight hundred forty-five billion, seven hundred nineteen million, seven hundred ninety-seven thousand, nine hundred thirty-one".