80866444039893 has 16 divisors (see below), whose sum is σ = 120062013825600. Its totient is φ = 53794019165040.

The previous prime is 80866444039883. The next prime is 80866444039943. The reversal of 80866444039893 is 39893044466808.

80866444039893 is a `hidden beast` number, since 8 + 0 + 8 + 6 + 6 + 4 + 440 + 3 + 98 + 93 = 666.

It is not a de Polignac number, because 80866444039893 - 2⁴ = 80866444039877 is a prime.

It is a super-2 number, since 2×80866444039893² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80866444039813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3248418663 + ... + 3248443556.

It is an arithmetic number, because the mean of its divisors is an integer number (7503875864100).

Almost surely, 2^{80866444039893} is an apocalyptic number.

It is an amenable number.

80866444039893 is a deficient number, since it is larger than the sum of its proper divisors (39195569785707).

80866444039893 is a wasteful number, since it uses less digits than its factorization.

80866444039893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6496862689 (or 6496862683 counting only the distinct ones).

The product of its (nonzero) digits is 859963392, while the sum is 72.

The spelling of 80866444039893 in words is "eighty trillion, eight hundred sixty-six billion, four hundred forty-four million, thirty-nine thousand, eight hundred ninety-three".