399396359655 has 80 divisors (see below), whose sum is σ = 719489232000. Its totient is φ = 211961940480.

The previous prime is 399396359633. The next prime is 399396359729. The reversal of 399396359655 is 556953693993.

It is not a de Polignac number, because 399396359655 - 2⁵ = 399396359623 is a prime.

It is a super-2 number, since 2×399396359655² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 115131261 + ... + 115134729.

It is an arithmetic number, because the mean of its divisors is an integer number (8993615400).

Almost surely, 2^399396359655 is an apocalyptic number.

399396359655 is a deficient number, since it is larger than the sum of its proper divisors (320092872345).

399396359655 is a wasteful number, since it uses less digits than its factorization.

399396359655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806 (or 4797 counting only the distinct ones).

The product of its digits is 797161500, while the sum is 72.

The spelling of 399396359655 in words is "three hundred ninety-nine billion, three hundred ninety-six million, three hundred fifty-nine thousand, six hundred fifty-five".