399996660610432 has 64 divisors (see below), whose sum is σ = 808770604262400. Its totient is φ = 197011161414144.

The previous prime is 399996660610423. The next prime is 399996660610447. The reversal of 399996660610432 is 234016066699993.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056708433 + ... + 1057086895.

It is an arithmetic number, because the mean of its divisors is an integer number (12637040691600).

Almost surely, 2^{399996660610432} is an apocalyptic number.

399996660610432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399996660610432 is an abundant number, since it is smaller than the sum of its proper divisors (408773943651968).

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

399996660610432 is a wasteful number, since it uses less digits than its factorization.

399996660610432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501783 (or 501771 counting only the distinct ones).

The product of its (nonzero) digits is 612220032, while the sum is 73.

The spelling of 399996660610432 in words is "three hundred ninety-nine trillion, nine hundred ninety-six billion, six hundred sixty million, six hundred ten thousand, four hundred thirty-two".