399972564992 has 612 divisors, whose sum is σ = 1115636506416. Its totient is φ = 141699317760.

The previous prime is 399972564967. The next prime is 399972565007. The reversal of 399972564992 is 299465279993.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5969739743 + ... + 5969739809.

It is an arithmetic number, because the mean of its divisors is an integer number (1822935468).

Almost surely, 2^399972564992 is an apocalyptic number.

399972564992 is a gapful number since it is divisible by the number (32) 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 399972564992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557818253208).

399972564992 is an abundant number, since it is smaller than the sum of its proper divisors (715663941424).

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

399972564992 is an equidigital number, since it uses as much as digits as its factorization.

399972564992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 100 counting only the distinct ones).

The product of its digits is 595213920, while the sum is 74.

The spelling of 399972564992 in words is "three hundred ninety-nine billion, nine hundred seventy-two million, five hundred sixty-four thousand, nine hundred ninety-two".