6999891008031 has 12 divisors (see below), whose sum is σ = 10113283984440. Its totient is φ = 4665518479440.

The previous prime is 6999891008023. The next prime is 6999891008039. The reversal of 6999891008031 is 1308001989996.

It is an interprime number because it is at equal distance from previous prime (6999891008023) and next prime (6999891008039).

It is not a de Polignac number, because 6999891008031 - 2³ = 6999891008023 is a prime.

It is a super-2 number, since 2×6999891008031² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6999891008031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6999891008039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89585940 + ... + 89664041.

It is an arithmetic number, because the mean of its divisors is an integer number (842773665370).

Almost surely, 2^{6999891008031} is an apocalyptic number.

6999891008031 is a deficient number, since it is larger than the sum of its proper divisors (3113392976409).

6999891008031 is a wasteful number, since it uses less digits than its factorization.

6999891008031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179254326 (or 179254323 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 63.

The spelling of 6999891008031 in words is "six trillion, nine hundred ninety-nine billion, eight hundred ninety-one million, eight thousand, thirty-one".