399129061600 has 72 divisors (see below), whose sum is σ = 997033763880. Its totient is φ = 155938782720.

The previous prime is 399129061577. The next prime is 399129061633. The reversal of 399129061600 is 6160921993.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5766895 + ... + 5835694.

It is an arithmetic number, because the mean of its divisors is an integer number (13847691165).

Almost surely, 2^399129061600 is an apocalyptic number.

It is an amenable number.

399129061600 is an abundant number, since it is smaller than the sum of its proper divisors (597904702280).

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

399129061600 is a wasteful number, since it uses less digits than its factorization.

399129061600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11602652 (or 11602639 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 399129061600 in words is "three hundred ninety-nine billion, one hundred twenty-nine million, sixty-one thousand, six hundred".