80409927940 has 24 divisors (see below), whose sum is σ = 171629061912. Its totient is φ = 31636692480.

The previous prime is 80409927919. The next prime is 80409927947. The reversal of 80409927940 is 4972990408.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5959531204 + 74450396736 = 77198^2 + 272856^2 .

It is a super-2 number, since 2×80409927940² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80409927947) 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, 32953669 + ... + 32956108.

It is an arithmetic number, because the mean of its divisors is an integer number (7151210913).

Almost surely, 2^80409927940 is an apocalyptic number.

It is an amenable number.

80409927940 is an abundant number, since it is smaller than the sum of its proper divisors (91219133972).

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

80409927940 is a wasteful number, since it uses less digits than its factorization.

80409927940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65909847 (or 65909845 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 80409927940 in words is "eighty billion, four hundred nine million, nine hundred twenty-seven thousand, nine hundred forty".