80744531866 has 16 divisors (see below), whose sum is σ = 124756363368. Its totient is φ = 39169958400.

The previous prime is 80744531863. The next prime is 80744531893. The reversal of 80744531866 is 66813544708.

It can be written as a sum of positive squares in 4 ways, for example, as 11909138641 + 68835393225 = 109129^2 + 262365^2 .

It is not an unprimeable number, because it can be changed into a prime (80744531863) 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, 2705295 + ... + 2734978.

Almost surely, 2^80744531866 is an apocalyptic number.

80744531866 is a deficient number, since it is larger than the sum of its proper divisors (44011831502).

80744531866 is a wasteful number, since it uses less digits than its factorization.

80744531866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440497.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 80744531866 in words is "eighty billion, seven hundred forty-four million, five hundred thirty-one thousand, eight hundred sixty-six".