165731407379 has 8 divisors (see below), whose sum is σ = 170271134208. Its totient is φ = 161233910920.

The previous prime is 165731407367. The next prime is 165731407381. The reversal of 165731407379 is 973704137561.

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

It is a cyclic number.

It is not a de Polignac number, because 165731407379 - 2²⁸ = 165462971923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165731407379.

It is not an unprimeable number, because it can be changed into a prime (165731407319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10549637 + ... + 10565334.

It is an arithmetic number, because the mean of its divisors is an integer number (21283891776).

Almost surely, 2^165731407379 is an apocalyptic number.

165731407379 is a deficient number, since it is larger than the sum of its proper divisors (4539726829).

165731407379 is a wasteful number, since it uses less digits than its factorization.

165731407379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21115185.

The product of its (nonzero) digits is 3333960, while the sum is 53.

The spelling of 165731407379 in words is "one hundred sixty-five billion, seven hundred thirty-one million, four hundred seven thousand, three hundred seventy-nine".