80993767680 has 432 divisors, whose sum is σ = 334194981120. Its totient is φ = 17707548672.

The previous prime is 80993767669. The next prime is 80993767681. The reversal of 80993767680 is 8676739908.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (80993767681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1832886 + ... + 1876554.

Almost surely, 2^80993767680 is an apocalyptic number.

80993767680 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 80993767680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167097490560).

80993767680 is an abundant number, since it is smaller than the sum of its proper divisors (253201213440).

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

80993767680 is a wasteful number, since it uses less digits than its factorization.

80993767680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43726 (or 43709 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 80993767680 in words is "eighty billion, nine hundred ninety-three million, seven hundred sixty-seven thousand, six hundred eighty".