80377242561 has 72 divisors (see below), whose sum is σ = 147879508608. Its totient is φ = 41599656000.

The previous prime is 80377242511. The next prime is 80377242577. The reversal of 80377242561 is 16524277308.

80377242561 is a `hidden beast` number, since 8 + 0 + 377 + 24 + 256 + 1 = 666.

It is not a de Polignac number, because 80377242561 - 2⁷ = 80377242433 is a prime.

It is a super-2 number, since 2×80377242561² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (80377242511) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1284051 + ... + 1345191.

It is an arithmetic number, because the mean of its divisors is an integer number (2053882064).

Almost surely, 2^80377242561 is an apocalyptic number.

It is an amenable number.

80377242561 is a deficient number, since it is larger than the sum of its proper divisors (67502266047).

80377242561 is a wasteful number, since it uses less digits than its factorization.

80377242561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61443 (or 61433 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 80377242561 in words is "eighty billion, three hundred seventy-seven million, two hundred forty-two thousand, five hundred sixty-one".