399680999923716 has 216 divisors, whose sum is σ = 1226393532000000. Its totient is φ = 109225748104704.

The previous prime is 399680999923697. The next prime is 399680999923771. The reversal of 399680999923716 is 617329999086993.

It is a happy number.

399680999923716 is a `hidden beast` number, since 3 + 9 + 9 + 68 + 0 + 9 + 99 + 92 + 371 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1267676805 + ... + 1267992051.

Almost surely, 2^{399680999923716} is an apocalyptic number.

399680999923716 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399680999923716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (613196766000000).

399680999923716 is an abundant number, since it is smaller than the sum of its proper divisors (826712532076284).

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

399680999923716 is a wasteful number, since it uses less digits than its factorization.

399680999923716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346543 (or 346531 counting only the distinct ones).

The product of its (nonzero) digits is 19284931008, while the sum is 90.

The spelling of 399680999923716 in words is "three hundred ninety-nine trillion, six hundred eighty billion, nine hundred ninety-nine million, nine hundred twenty-three thousand, seven hundred sixteen".