80439042900861 has 16 divisors (see below), whose sum is σ = 126178890825600. Its totient is φ = 50471556329664.

The previous prime is 80439042900859. The next prime is 80439042900863. The reversal of 80439042900861 is 16800924093408.

80439042900861 is a `hidden beast` number, since 8 + 0 + 439 + 0 + 42 + 90 + 0 + 86 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (80439042900859) and next prime (80439042900863).

It is not a de Polignac number, because 80439042900861 - 2¹ = 80439042900859 is a prime.

It is a super-3 number, since 3×80439042900861³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80439042900798 and 80439042900807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80439042900863) 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, 87624229281 + ... + 87624230198.

It is an arithmetic number, because the mean of its divisors is an integer number (7886180676600).

Almost surely, 2^{80439042900861} is an apocalyptic number.

It is an amenable number.

80439042900861 is a deficient number, since it is larger than the sum of its proper divisors (45739847924739).

80439042900861 is a wasteful number, since it uses less digits than its factorization.

80439042900861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175248459505 (or 175248459499 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 80439042900861 in words is "eighty trillion, four hundred thirty-nine billion, forty-two million, nine hundred thousand, eight hundred sixty-one".