399159850906 has 4 divisors (see below), whose sum is σ = 598739776362. Its totient is φ = 199579925452.

The previous prime is 399159850891. The next prime is 399159850919. The reversal of 399159850906 is 609058951993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 355126605625 + 44033245281 = 595925^2 + 209841^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99789962725 + ... + 99789962728.

Almost surely, 2^399159850906 is an apocalyptic number.

399159850906 is a deficient number, since it is larger than the sum of its proper divisors (199579925456).

399159850906 is a wasteful number, since it uses less digits than its factorization.

399159850906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199579925455.

The product of its (nonzero) digits is 23619600, while the sum is 64.

The spelling of 399159850906 in words is "three hundred ninety-nine billion, one hundred fifty-nine million, eight hundred fifty thousand, nine hundred six".