80911540800 has 504 divisors, whose sum is σ = 312759720936. Its totient is φ = 19756154880.

The previous prime is 80911540789. The next prime is 80911540861. The reversal of 80911540800 is 804511908.

It can be written as a sum of positive squares in 12 ways, for example, as 6487335936 + 74424204864 = 80544^2 + 272808^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 9053134 + ... + 9062066.

Almost surely, 2^80911540800 is an apocalyptic number.

80911540800 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 80911540800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156379860468).

80911540800 is an abundant number, since it is smaller than the sum of its proper divisors (231848180136).

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

80911540800 is a wasteful number, since it uses less digits than its factorization.

80911540800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9015 (or 8997 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 80911540800 in words is "eighty billion, nine hundred eleven million, five hundred forty thousand, eight hundred".