165015481857 has 8 divisors (see below), whose sum is σ = 220838564160. Its totient is φ = 109601360400.

The previous prime is 165015481837. The next prime is 165015481861. The reversal of 165015481857 is 758184510561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165015481857 - 2¹¹ = 165015479809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165015481837) by changing a digit.

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, 102239269 + ... + 102240882.

It is an arithmetic number, because the mean of its divisors is an integer number (27604820520).

Almost surely, 2^165015481857 is an apocalyptic number.

It is an amenable number.

165015481857 is a deficient number, since it is larger than the sum of its proper divisors (55823082303).

165015481857 is a wasteful number, since it uses less digits than its factorization.

165015481857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204480423.

The product of its (nonzero) digits is 1344000, while the sum is 51.

The spelling of 165015481857 in words is "one hundred sixty-five billion, fifteen million, four hundred eighty-one thousand, eight hundred fifty-seven".