399128879255 has 8 divisors (see below), whose sum is σ = 479105811600. Its totient is φ = 319202332416.

The previous prime is 399128879221. The next prime is 399128879297. The reversal of 399128879255 is 552978821993.

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 399128879255 - 2¹⁰ = 399128878231 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12578945 + ... + 12610634.

It is an arithmetic number, because the mean of its divisors is an integer number (59888226450).

Almost surely, 2^399128879255 is an apocalyptic number.

399128879255 is a deficient number, since it is larger than the sum of its proper divisors (79976932345).

399128879255 is a wasteful number, since it uses less digits than its factorization.

399128879255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25192753.

The product of its digits is 97977600, while the sum is 68.

The spelling of 399128879255 in words is "three hundred ninety-nine billion, one hundred twenty-eight million, eight hundred seventy-nine thousand, two hundred fifty-five".