165782771108 has 24 divisors (see below), whose sum is σ = 290724302400. Its totient is φ = 82718764128.

The previous prime is 165782771071. The next prime is 165782771113. The reversal of 165782771108 is 801177287561.

It is a self number, because there is not a number n which added to its sum of digits gives 165782771108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11981138 + ... + 11994966.

It is an arithmetic number, because the mean of its divisors is an integer number (12113512600).

Almost surely, 2^165782771108 is an apocalyptic number.

It is an amenable number.

165782771108 is a deficient number, since it is larger than the sum of its proper divisors (124941531292).

165782771108 is a wasteful number, since it uses less digits than its factorization.

165782771108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19859 (or 19857 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 53.

The spelling of 165782771108 in words is "one hundred sixty-five billion, seven hundred eighty-two million, seven hundred seventy-one thousand, one hundred eight".