399957586016 has 48 divisors (see below), whose sum is σ = 828999586800. Its totient is φ = 189421567488.

The previous prime is 399957585983. The next prime is 399957586069. The reversal of 399957586016 is 610685759993.

It is a super-2 number, since 2×399957586016² (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 7 ways as a sum of consecutive naturals, for example, 3759086 + ... + 3864018.

It is an arithmetic number, because the mean of its divisors is an integer number (17270824725).

Almost surely, 2^399957586016 is an apocalyptic number.

It is an amenable number.

399957586016 is an abundant number, since it is smaller than the sum of its proper divisors (429042000784).

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

399957586016 is a wasteful number, since it uses less digits than its factorization.

399957586016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111231 (or 111223 counting only the distinct ones).

The product of its (nonzero) digits is 110224800, while the sum is 68.

Adding to 399957586016 its sum of digits (68), we get a square (399957586084 = 632422²).

The spelling of 399957586016 in words is "three hundred ninety-nine billion, nine hundred fifty-seven million, five hundred eighty-six thousand, sixteen".