399970599245568 has 576 divisors, whose sum is σ = 1296008475596800. Its totient is φ = 120933725552640.

The previous prime is 399970599245551. The next prime is 399970599245573. The reversal of 399970599245568 is 865542995079993.

399970599245568 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 7 + 0 + 5 + 9 + 92 + 455 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×399970599245568² (a number of 30 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 63 ways as a sum of consecutive naturals, for example, 1497676146 + ... + 1497943182.

Almost surely, 2^{399970599245568} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399970599245568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648004237798400).

399970599245568 is an abundant number, since it is smaller than the sum of its proper divisors (896037876351232).

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

399970599245568 is a wasteful number, since it uses less digits than its factorization.

399970599245568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267365 (or 267345 counting only the distinct ones).

The product of its (nonzero) digits is 59521392000, while the sum is 90.

The spelling of 399970599245568 in words is "three hundred ninety-nine trillion, nine hundred seventy billion, five hundred ninety-nine million, two hundred forty-five thousand, five hundred sixty-eight".