80515718140 has 96 divisors (see below), whose sum is σ = 198842567616. Its totient is φ = 26999101440.

The previous prime is 80515718137. The next prime is 80515718159. The reversal of 80515718140 is 4181751508.

It is a junction number, because it is equal to n+sod(n) for n = 80515718093 and 80515718102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2940754 + ... + 2968006.

It is an arithmetic number, because the mean of its divisors is an integer number (2071276746).

Almost surely, 2^80515718140 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 80515718140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99421283808).

80515718140 is an abundant number, since it is smaller than the sum of its proper divisors (118326849476).

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

80515718140 is a wasteful number, since it uses less digits than its factorization.

80515718140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28319 (or 28317 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 40.

The spelling of 80515718140 in words is "eighty billion, five hundred fifteen million, seven hundred eighteen thousand, one hundred forty".