6399831311719 has 16 divisors (see below), whose sum is σ = 6440293057536. Its totient is φ = 6359510152800.

The previous prime is 6399831311711. The next prime is 6399831311761. The reversal of 6399831311719 is 9171131389936.

It is a cyclic number.

It is not a de Polignac number, because 6399831311719 - 2³ = 6399831311711 is a prime.

It is a super-2 number, since 2×6399831311719² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399831311711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363060984 + ... + 363078610.

It is an arithmetic number, because the mean of its divisors is an integer number (402518316096).

Almost surely, 2^{6399831311719} is an apocalyptic number.

6399831311719 is a deficient number, since it is larger than the sum of its proper divisors (40461745817).

6399831311719 is a wasteful number, since it uses less digits than its factorization.

6399831311719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21486.

The product of its digits is 6613488, while the sum is 61.

The spelling of 6399831311719 in words is "six trillion, three hundred ninety-nine billion, eight hundred thirty-one million, three hundred eleven thousand, seven hundred nineteen".