80189814640 has 640 divisors, whose sum is σ = 238124759040. Its totient is φ = 24758452224.

The previous prime is 80189814613. The next prime is 80189814647. The reversal of 80189814640 is 4641898108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80189814647) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 749437467 + ... + 749437573.

It is an arithmetic number, because the mean of its divisors is an integer number (372069936).

Almost surely, 2^80189814640 is an apocalyptic number.

80189814640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80189814640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119062379520).

80189814640 is an abundant number, since it is smaller than the sum of its proper divisors (157934944400).

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

80189814640 is a wasteful number, since it uses less digits than its factorization.

80189814640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 80189814640 in words is "eighty billion, one hundred eighty-nine million, eight hundred fourteen thousand, six hundred forty".