80400840844 has 24 divisors (see below), whose sum is σ = 143546457600. Its totient is φ = 39391950480.

The previous prime is 80400840833. The next prime is 80400840847. The reversal of 80400840844 is 44804800408.

It is a junction number, because it is equal to n+sod(n) for n = 80400840797 and 80400840806.

It is not an unprimeable number, because it can be changed into a prime (80400840847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474324 + ... + 621115.

It is an arithmetic number, because the mean of its divisors is an integer number (5981102400).

Almost surely, 2^80400840844 is an apocalyptic number.

It is an amenable number.

80400840844 is a deficient number, since it is larger than the sum of its proper divisors (63145616756).

80400840844 is a wasteful number, since it uses less digits than its factorization.

80400840844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095813 (or 1095811 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The spelling of 80400840844 in words is "eighty billion, four hundred million, eight hundred forty thousand, eight hundred forty-four".