80408840080 has 80 divisors (see below), whose sum is σ = 190896714864. Its totient is φ = 31491072000.

The previous prime is 80408840027. The next prime is 80408840093. The reversal of 80408840080 is 8004880408.

It can be written as a sum of positive squares in 8 ways, for example, as 2616936336 + 77791903744 = 51156^2 + 278912^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×80408840080² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749830 + ... + 850330.

Almost surely, 2^80408840080 is an apocalyptic number.

80408840080 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 80408840080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95448357432).

80408840080 is an abundant number, since it is smaller than the sum of its proper divisors (110487874784).

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

80408840080 is a wasteful number, since it uses less digits than its factorization.

80408840080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100724 (or 100718 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 40.

The spelling of 80408840080 in words is "eighty billion, four hundred eight million, eight hundred forty thousand, eighty".