162772891805 has 4 divisors (see below), whose sum is σ = 195327470172. Its totient is φ = 130218313440.

The previous prime is 162772891789. The next prime is 162772891877. The reversal of 162772891805 is 508198277261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508198277261 = 171641 ⋅2960821.

It can be written as a sum of positive squares in 2 ways, for example, as 21347255449 + 141425636356 = 146107^2 + 376066^2 .

It is not a de Polignac number, because 162772891805 - 2⁴ = 162772891789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16277289176 + ... + 16277289185.

It is an arithmetic number, because the mean of its divisors is an integer number (48831867543).

Almost surely, 2^162772891805 is an apocalyptic number.

It is an amenable number.

162772891805 is a deficient number, since it is larger than the sum of its proper divisors (32554578367).

162772891805 is an equidigital number, since it uses as much as digits as its factorization.

162772891805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32554578366.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 162772891805 in words is "one hundred sixty-two billion, seven hundred seventy-two million, eight hundred ninety-one thousand, eight hundred five".