8091971121388 has 48 divisors (see below), whose sum is σ = 18065796021504. Its totient is φ = 3079397039040.

The previous prime is 8091971121379. The next prime is 8091971121397. The reversal of 8091971121388 is 8831211791908.

It is an interprime number because it is at equal distance from previous prime (8091971121379) and next prime (8091971121397).

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, 305482495 + ... + 305508982.

It is an arithmetic number, because the mean of its divisors is an integer number (376370750448).

Almost surely, 2^{8091971121388} is an apocalyptic number.

It is an amenable number.

8091971121388 is an abundant number, since it is smaller than the sum of its proper divisors (9973824900116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8091971121388 is a wasteful number, since it uses less digits than its factorization.

8091971121388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610991542 (or 610991540 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 58.

The spelling of 8091971121388 in words is "eight trillion, ninety-one billion, nine hundred seventy-one million, one hundred twenty-one thousand, three hundred eighty-eight".