399765356331 has 8 divisors (see below), whose sum is σ = 581476881984. Its totient is φ = 242282034120.

The previous prime is 399765356329. The next prime is 399765356449. The reversal of 399765356331 is 133653567993.

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

It is not a de Polignac number, because 399765356331 - 2¹ = 399765356329 is a prime.

It is a super-2 number, since 2×399765356331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399765356321) 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, 6057050821 + ... + 6057050886.

It is an arithmetic number, because the mean of its divisors is an integer number (72684610248).

Almost surely, 2^399765356331 is an apocalyptic number.

399765356331 is a deficient number, since it is larger than the sum of its proper divisors (181711525653).

399765356331 is a wasteful number, since it uses less digits than its factorization.

399765356331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12114101721.

The product of its digits is 41334300, while the sum is 60.

The spelling of 399765356331 in words is "three hundred ninety-nine billion, seven hundred sixty-five million, three hundred fifty-six thousand, three hundred thirty-one".