80185987992 has 128 divisors (see below), whose sum is σ = 228432960000. Its totient is φ = 23218314240.

The previous prime is 80185987979. The next prime is 80185988011. The reversal of 80185987992 is 29978958108.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6363234 + ... + 6375822.

It is an arithmetic number, because the mean of its divisors is an integer number (1784632500).

Almost surely, 2^80185987992 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 80185987992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114216480000).

80185987992 is an abundant number, since it is smaller than the sum of its proper divisors (148246972008).

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

80185987992 is a wasteful number, since it uses less digits than its factorization.

80185987992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13681 (or 13677 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 66.

The spelling of 80185987992 in words is "eighty billion, one hundred eighty-five million, nine hundred eighty-seven thousand, nine hundred ninety-two".