399911918245 has 16 divisors (see below), whose sum is σ = 580712433408. Its totient is φ = 258094414080.

The previous prime is 399911918239. The next prime is 399911918309. The reversal of 399911918245 is 542819119993.

It is not a de Polignac number, because 399911918245 - 2¹¹ = 399911916197 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, 336059841 + ... + 336061030.

It is an arithmetic number, because the mean of its divisors is an integer number (36294527088).

Almost surely, 2^399911918245 is an apocalyptic number.

399911918245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

399911918245 is a deficient number, since it is larger than the sum of its proper divisors (180800515163).

399911918245 is a wasteful number, since it uses less digits than its factorization.

399911918245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672120900.

The product of its digits is 6298560, while the sum is 61.

The spelling of 399911918245 in words is "three hundred ninety-nine billion, nine hundred eleven million, nine hundred eighteen thousand, two hundred forty-five".