399199664500 has 96 divisors (see below), whose sum is σ = 1073048820480. Its totient is φ = 126340099200.

The previous prime is 399199664467. The next prime is 399199664537. The reversal of 399199664500 is 5466991993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4341310 + ... + 4432309.

It is an arithmetic number, because the mean of its divisors is an integer number (11177591880).

Almost surely, 2^399199664500 is an apocalyptic number.

It is an amenable number.

399199664500 is an abundant number, since it is smaller than the sum of its proper divisors (673849155980).

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

399199664500 is a wasteful number, since it uses less digits than its factorization.

399199664500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8773658 (or 8773646 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 61.

The spelling of 399199664500 in words is "three hundred ninety-nine billion, one hundred ninety-nine million, six hundred sixty-four thousand, five hundred".