80491806720 has 1152 divisors, whose sum is σ = 336760772400. Its totient is φ = 17666408448.

The previous prime is 80491806713. The next prime is 80491806721. The reversal of 80491806720 is 2760819408.

80491806720 is a `hidden beast` number, since 8 + 0 + 491 + 80 + 67 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80491806721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4236410871 + ... + 4236410889.

Almost surely, 2^80491806720 is an apocalyptic number.

80491806720 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 80491806720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168380386200).

80491806720 is an abundant number, since it is smaller than the sum of its proper divisors (256268965680).

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

80491806720 is a wasteful number, since it uses less digits than its factorization.

80491806720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 80491806720 in words is "eighty billion, four hundred ninety-one million, eight hundred six thousand, seven hundred twenty".