80959443840 has 1024 divisors, whose sum is σ = 341055360000. Its totient is φ = 17929175040.

The previous prime is 80959443823. The next prime is 80959443871. The reversal of 80959443840 is 4834495908.

80959443840 is a `hidden beast` number, since 8 + 0 + 9 + 594 + 4 + 3 + 8 + 40 = 666.

It is a super-2 number, since 2×80959443840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 104733694 + ... + 104734466.

It is an arithmetic number, because the mean of its divisors is an integer number (333061875).

Almost surely, 2^80959443840 is an apocalyptic number.

80959443840 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 80959443840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170527680000).

80959443840 is an abundant number, since it is smaller than the sum of its proper divisors (260095916160).

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

80959443840 is a wasteful number, since it uses less digits than its factorization.

80959443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 80959443840 in words is "eighty billion, nine hundred fifty-nine million, four hundred forty-three thousand, eight hundred forty".