165158077969 has 12 divisors (see below), whose sum is σ = 179727326604. Its totient is φ = 151241716224.

The previous prime is 165158077957. The next prime is 165158077991. The reversal of 165158077969 is 969770851561.

It can be written as a sum of positive squares in 6 ways, for example, as 17192454400 + 147965623569 = 131120^2 + 384663^2 .

It is not a de Polignac number, because 165158077969 - 2¹¹ = 165158075921 is a prime.

It is a super-2 number, since 2×165158077969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165158077969.

It is not an unprimeable number, because it can be changed into a prime (165158077069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3525004 + ... + 3571549.

It is an arithmetic number, because the mean of its divisors is an integer number (14977277217).

Almost surely, 2^165158077969 is an apocalyptic number.

It is an amenable number.

165158077969 is a deficient number, since it is larger than the sum of its proper divisors (14569248635).

165158077969 is an equidigital number, since it uses as much as digits as its factorization.

165158077969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096644 (or 7096607 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 165158077969 in words is "one hundred sixty-five billion, one hundred fifty-eight million, seventy-seven thousand, nine hundred sixty-nine".