80987830722 has 126 divisors (see below), whose sum is σ = 189373388763. Its totient is φ = 25963628544.

The previous prime is 80987830661. The next prime is 80987830793. The reversal of 80987830722 is 22703878908.

It can be written as a sum of positive squares in 5 ways, for example, as 80173356201 + 814474521 = 283149^2 + 28539^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=201231.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 315127618 + ... + 315127874.

Almost surely, 2^80987830722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80987830722

80987830722 is an abundant number, since it is smaller than the sum of its proper divisors (108385558041).

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

80987830722 is an frugal number, since it uses more digits than its factorization.

80987830722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

It can be divided in two parts, 8098 and 7830722, that added together give a triangular number (7838820 = T₃₉₅₉).

The spelling of 80987830722 in words is "eighty billion, nine hundred eighty-seven million, eight hundred thirty thousand, seven hundred twenty-two".