165002987865 has 16 divisors (see below), whose sum is σ = 265686343488. Its totient is φ = 87441072576.

The previous prime is 165002987803. The next prime is 165002987939. The reversal of 165002987865 is 568789200561.

It is not a de Polignac number, because 165002987865 - 2¹⁴ = 165002971481 is a prime.

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, 35030127 + ... + 35034836.

It is an arithmetic number, because the mean of its divisors is an integer number (16605396468).

Almost surely, 2^165002987865 is an apocalyptic number.

165002987865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165002987865 is a deficient number, since it is larger than the sum of its proper divisors (100683355623).

165002987865 is a wasteful number, since it uses less digits than its factorization.

165002987865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70065128.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 165002987865 in words is "one hundred sixty-five billion, two million, nine hundred eighty-seven thousand, eight hundred sixty-five".