165161434161988 has 48 divisors (see below), whose sum is σ = 315611570933568. Its totient is φ = 75001152512000.

The previous prime is 165161434161883. The next prime is 165161434162007. The reversal of 165161434161988 is 889161434161561.

It is a super-2 number, since 2×165161434161988² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1268056548 + ... + 1268186788.

It is an arithmetic number, because the mean of its divisors is an integer number (6575241061116).

Almost surely, 2^{165161434161988} is an apocalyptic number.

It is an amenable number.

165161434161988 is a deficient number, since it is larger than the sum of its proper divisors (150450136771580).

165161434161988 is a wasteful number, since it uses less digits than its factorization.

165161434161988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157764 (or 157762 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 64.

The spelling of 165161434161988 in words is "one hundred sixty-five trillion, one hundred sixty-one billion, four hundred thirty-four million, one hundred sixty-one thousand, nine hundred eighty-eight".