80161880440 has 32 divisors (see below), whose sum is σ = 180875209680. Its totient is φ = 31973911552.

The previous prime is 80161880389. The next prime is 80161880453. The reversal of 80161880440 is 4408816108.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 80161880393 and 80161880402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2824474 + ... + 2852713.

Almost surely, 2^80161880440 is an apocalyptic number.

It is an amenable number.

80161880440 is an abundant number, since it is smaller than the sum of its proper divisors (100713329240).

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

80161880440 is a wasteful number, since it uses less digits than its factorization.

80161880440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677551 (or 5677547 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 80161880440 in words is "eighty billion, one hundred sixty-one million, eight hundred eighty thousand, four hundred forty".