80997801984 has 504 divisors, whose sum is σ = 266988770568. Its totient is φ = 24365629440.

The previous prime is 80997801977. The next prime is 80997802003. The reversal of 80997801984 is 48910879908.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 591224764 + ... + 591224900.

Almost surely, 2^80997801984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80997801984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133494385284).

80997801984 is an abundant number, since it is smaller than the sum of its proper divisors (185990968584).

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

80997801984 is an frugal number, since it uses more digits than its factorization.

80997801984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The spelling of 80997801984 in words is "eighty billion, nine hundred ninety-seven million, eight hundred one thousand, nine hundred eighty-four".