80791566818688 has 576 divisors, whose sum is σ = 271471276636560. Its totient is φ = 23885118259200.

The previous prime is 80791566818603. The next prime is 80791566818783. The reversal of 80791566818688 is 88681866519708.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 154045156 + ... + 154568732.

Almost surely, 2^{80791566818688} is an apocalyptic number.

80791566818688 is a gapful number since it is divisible by the number (88) 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 80791566818688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135735638318280).

80791566818688 is an abundant number, since it is smaller than the sum of its proper divisors (190679709817872).

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

80791566818688 is a wasteful number, since it uses less digits than its factorization.

80791566818688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523669 (or 523634 counting only the distinct ones).

The product of its (nonzero) digits is 2229534720, while the sum is 81.

The spelling of 80791566818688 in words is "eighty trillion, seven hundred ninety-one billion, five hundred sixty-six million, eight hundred eighteen thousand, six hundred eighty-eight".