80777840544 has 96 divisors (see below), whose sum is σ = 238920554880. Its totient is φ = 26546688000.

The previous prime is 80777840527. The next prime is 80777840579. The reversal of 80777840544 is 44504877708.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597057 + ... + 719744.

It is an arithmetic number, because the mean of its divisors is an integer number (2488755780).

Almost surely, 2^80777840544 is an apocalyptic number.

It is an amenable number.

80777840544 is an abundant number, since it is smaller than the sum of its proper divisors (158142714336).

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

80777840544 is a wasteful number, since it uses less digits than its factorization.

80777840544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316891 (or 1316877 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 54.

The spelling of 80777840544 in words is "eighty billion, seven hundred seventy-seven million, eight hundred forty thousand, five hundred forty-four".