7988191662416 has 80 divisors (see below), whose sum is σ = 18051955850880. Its totient is φ = 3353507512320.

The previous prime is 7988191662391. The next prime is 7988191662497. The reversal of 7988191662416 is 6142661918897.

It is a super-2 number, since 2×7988191662416² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 294161 + ... + 4007856.

It is an arithmetic number, because the mean of its divisors is an integer number (225649448136).

Almost surely, 2^{7988191662416} is an apocalyptic number.

It is an amenable number.

7988191662416 is an abundant number, since it is smaller than the sum of its proper divisors (10063764188464).

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

7988191662416 is a wasteful number, since it uses less digits than its factorization.

7988191662416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302372 (or 4302366 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 68.

The spelling of 7988191662416 in words is "seven trillion, nine hundred eighty-eight billion, one hundred ninety-one million, six hundred sixty-two thousand, four hundred sixteen".