7981198868016 has 60 divisors (see below), whose sum is σ = 24366842003400. Its totient is φ = 2418545111040.

The previous prime is 7981198868009. The next prime is 7981198868047. The reversal of 7981198868016 is 6108688911897.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2519316241 + ... + 2519319408.

It is an arithmetic number, because the mean of its divisors is an integer number (406114033390).

Almost surely, 2^{7981198868016} is an apocalyptic number.

It is an amenable number.

7981198868016 is an abundant number, since it is smaller than the sum of its proper divisors (16385643135384).

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

7981198868016 is a wasteful number, since it uses less digits than its factorization.

7981198868016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038635674 (or 5038635665 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 72.

The spelling of 7981198868016 in words is "seven trillion, nine hundred eighty-one billion, one hundred ninety-eight million, eight hundred sixty-eight thousand, sixteen".