399199658774 has 16 divisors (see below), whose sum is σ = 684350650368. Its totient is φ = 171083473512.

The previous prime is 399199658731. The next prime is 399199658801. The reversal of 399199658774 is 477856991993.

It is a junction number, because it is equal to n+sod(n) for n = 399199658695 and 399199658704.

It is a congruent number.

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, 1715777 + ... + 1934499.

It is an arithmetic number, because the mean of its divisors is an integer number (42771915648).

Almost surely, 2^399199658774 is an apocalyptic number.

399199658774 is a deficient number, since it is larger than the sum of its proper divisors (285150991594).

399199658774 is a wasteful number, since it uses less digits than its factorization.

399199658774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349099.

The product of its digits is 925888320, while the sum is 77.

The spelling of 399199658774 in words is "three hundred ninety-nine billion, one hundred ninety-nine million, six hundred fifty-eight thousand, seven hundred seventy-four".