80905904863 has 16 divisors (see below), whose sum is σ = 94114750464. Its totient is φ = 68120589600.

The previous prime is 80905904843. The next prime is 80905904903. The reversal of 80905904863 is 36840950908.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-80905904863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80905904863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80905904843) 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, 360745 + ... + 540322.

It is an arithmetic number, because the mean of its divisors is an integer number (5882171904).

Almost surely, 2^80905904863 is an apocalyptic number.

80905904863 is a deficient number, since it is larger than the sum of its proper divisors (13208845601).

80905904863 is a wasteful number, since it uses less digits than its factorization.

80905904863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901302.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 80905904863 in words is "eighty billion, nine hundred five million, nine hundred four thousand, eight hundred sixty-three".