399786470016 has 64 divisors (see below), whose sum is σ = 1062005778720. Its totient is φ = 133253000192.

The previous prime is 399786469997. The next prime is 399786470053. The reversal of 399786470016 is 610074687993.

It is a tau number, because it is divible by the number of its divisors (64).

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, 7782271 + ... + 7833473.

Almost surely, 2^399786470016 is an apocalyptic number.

It is an amenable number.

399786470016 is an abundant number, since it is smaller than the sum of its proper divisors (662219308704).

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

399786470016 is a wasteful number, since it uses less digits than its factorization.

399786470016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71553 (or 71541 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 60.

The spelling of 399786470016 in words is "three hundred ninety-nine billion, seven hundred eighty-six million, four hundred seventy thousand, sixteen".