7880131795991 has 32 divisors (see below), whose sum is σ = 9802506000000. Its totient is φ = 6168147148800.

The previous prime is 7880131795981. The next prime is 7880131796027. The reversal of 7880131795991 is 1995971310887.

It is a de Polignac number, because none of the positive numbers 2^k-7880131795991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7880131795981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11136335 + ... + 11822783.

It is an arithmetic number, because the mean of its divisors is an integer number (306328312500).

Almost surely, 2^{7880131795991} is an apocalyptic number.

7880131795991 is a deficient number, since it is larger than the sum of its proper divisors (1922374204009).

7880131795991 is a wasteful number, since it uses less digits than its factorization.

7880131795991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687819.

The product of its (nonzero) digits is 34292160, while the sum is 68.

The spelling of 7880131795991 in words is "seven trillion, eight hundred eighty billion, one hundred thirty-one million, seven hundred ninety-five thousand, nine hundred ninety-one".