399169798135 has 16 divisors (see below), whose sum is σ = 490812592032. Its totient is φ = 311467276800.

The previous prime is 399169798109. The next prime is 399169798201. The reversal of 399169798135 is 531897961993.

It is not a de Polignac number, because 399169798135 - 2¹¹ = 399169796087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558187 + ... + 1053523.

It is an arithmetic number, because the mean of its divisors is an integer number (30675787002).

Almost surely, 2^399169798135 is an apocalyptic number.

399169798135 is a deficient number, since it is larger than the sum of its proper divisors (91642793897).

399169798135 is a wasteful number, since it uses less digits than its factorization.

399169798135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499314.

The product of its digits is 99202320, while the sum is 70.

The spelling of 399169798135 in words is "three hundred ninety-nine billion, one hundred sixty-nine million, seven hundred ninety-eight thousand, one hundred thirty-five".