399348579165 has 16 divisors (see below), whose sum is σ = 639030522048. Its totient is φ = 212961643776.

The previous prime is 399348579151. The next prime is 399348579173. The reversal of 399348579165 is 561975843993.

It is not a de Polignac number, because 399348579165 - 2⁶ = 399348579101 is a prime.

It is a super-2 number, since 2×399348579165² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399348579165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1380124 + ... + 1644213.

It is an arithmetic number, because the mean of its divisors is an integer number (39939407628).

Almost surely, 2^399348579165 is an apocalyptic number.

It is an amenable number.

399348579165 is a deficient number, since it is larger than the sum of its proper divisors (239681942883).

399348579165 is a wasteful number, since it uses less digits than its factorization.

399348579165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033148.

The product of its digits is 220449600, while the sum is 69.

The spelling of 399348579165 in words is "three hundred ninety-nine billion, three hundred forty-eight million, five hundred seventy-nine thousand, one hundred sixty-five".