165390790853 has 16 divisors (see below), whose sum is σ = 166680552192. Its totient is φ = 164107944000.

The previous prime is 165390790847. The next prime is 165390790871. The reversal of 165390790853 is 358097093561.

It is a cyclic number.

It is not a de Polignac number, because 165390790853 - 2²² = 165386596549 is a prime.

It is a super-2 number, since 2×165390790853² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165390790753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70648463 + ... + 70650803.

It is an arithmetic number, because the mean of its divisors is an integer number (10417534512).

Almost surely, 2^165390790853 is an apocalyptic number.

It is an amenable number.

165390790853 is a deficient number, since it is larger than the sum of its proper divisors (1289761339).

165390790853 is a wasteful number, since it uses less digits than its factorization.

165390790853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3596.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 165390790853 in words is "one hundred sixty-five billion, three hundred ninety million, seven hundred ninety thousand, eight hundred fifty-three".