399755022856 has 32 divisors (see below), whose sum is σ = 858362604480. Its totient is φ = 170974641600.

The previous prime is 399755022839. The next prime is 399755022913. The reversal of 399755022856 is 658220557993.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 399755022794 and 399755022803.

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, 7241835 + ... + 7296826.

It is an arithmetic number, because the mean of its divisors is an integer number (26823831390).

Almost surely, 2^399755022856 is an apocalyptic number.

It is an amenable number.

399755022856 is an abundant number, since it is smaller than the sum of its proper divisors (458607581624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399755022856 is a wasteful number, since it uses less digits than its factorization.

399755022856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14539165 (or 14539161 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 399755022856 in words is "three hundred ninety-nine billion, seven hundred fifty-five million, twenty-two thousand, eight hundred fifty-six".