6990195315591 has 12 divisors (see below), whose sum is σ = 10445119437480. Its totient is φ = 4499436065040.

The previous prime is 6990195315583. The next prime is 6990195315617. The reversal of 6990195315591 is 1955135910996.

6990195315591 is a `hidden beast` number, since 6 + 9 + 9 + 0 + 1 + 9 + 5 + 31 + 5 + 591 = 666.

It is not a de Polignac number, because 6990195315591 - 2³ = 6990195315583 is a prime.

It is a super-2 number, since 2×6990195315591² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990195315091) 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, 13391178505 + ... + 13391179026.

It is an arithmetic number, because the mean of its divisors is an integer number (870426619790).

Almost surely, 2^{6990195315591} is an apocalyptic number.

6990195315591 is a deficient number, since it is larger than the sum of its proper divisors (3454924121889).

6990195315591 is a wasteful number, since it uses less digits than its factorization.

6990195315591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26782357566 (or 26782357563 counting only the distinct ones).

The product of its (nonzero) digits is 14762250, while the sum is 63.

The spelling of 6990195315591 in words is "six trillion, nine hundred ninety billion, one hundred ninety-five million, three hundred fifteen thousand, five hundred ninety-one".