165917494074 has 16 divisors (see below), whose sum is σ = 331981005312. Its totient is φ = 55281495168.

The previous prime is 165917494049. The next prime is 165917494111. The reversal of 165917494074 is 470494719561.

It is a super-2 number, since 2×165917494074² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6069274 + ... + 6096549.

It is an arithmetic number, because the mean of its divisors is an integer number (20748812832).

Almost surely, 2^165917494074 is an apocalyptic number.

165917494074 is an abundant number, since it is smaller than the sum of its proper divisors (166063511238).

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

165917494074 is a wasteful number, since it uses less digits than its factorization.

165917494074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168101.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 165917494074 in words is "one hundred sixty-five billion, nine hundred seventeen million, four hundred ninety-four thousand, seventy-four".