165265364879 has 4 divisors (see below), whose sum is σ = 167732012184. Its totient is φ = 162798717576.

The previous prime is 165265364863. The next prime is 165265364899. The reversal of 165265364879 is 978463562561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978463562561 = 59 ⋅16584128179.

It is a cyclic number.

It is not a de Polignac number, because 165265364879 - 2⁴ = 165265364863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165265364809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233323552 + ... + 1233323685.

It is an arithmetic number, because the mean of its divisors is an integer number (41933003046).

Almost surely, 2^165265364879 is an apocalyptic number.

165265364879 is a deficient number, since it is larger than the sum of its proper divisors (2466647305).

165265364879 is an equidigital number, since it uses as much as digits as its factorization.

165265364879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466647304.

The product of its digits is 65318400, while the sum is 62.

The spelling of 165265364879 in words is "one hundred sixty-five billion, two hundred sixty-five million, three hundred sixty-four thousand, eight hundred seventy-nine".