165456076801 has 4 divisors (see below), whose sum is σ = 167550457600. Its totient is φ = 163361696004.

The previous prime is 165456076789. The next prime is 165456076813. The reversal of 165456076801 is 108670654561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (165456076789) and next prime (165456076813).

It is a cyclic number.

It is not a de Polignac number, because 165456076801 - 2¹¹ = 165456074753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165456076861) 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, 1047190281 + ... + 1047190438.

It is an arithmetic number, because the mean of its divisors is an integer number (41887614400).

Almost surely, 2^165456076801 is an apocalyptic number.

It is an amenable number.

165456076801 is a deficient number, since it is larger than the sum of its proper divisors (2094380799).

165456076801 is an equidigital number, since it uses as much as digits as its factorization.

165456076801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094380798.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 165456076801 in words is "one hundred sixty-five billion, four hundred fifty-six million, seventy-six thousand, eight hundred one".