80561959796 has 24 divisors (see below), whose sum is σ = 143112068736. Its totient is φ = 39676734720.

The previous prime is 80561959759. The next prime is 80561959811. The reversal of 80561959796 is 69795916508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410156 + ... + 573891.

It is an arithmetic number, because the mean of its divisors is an integer number (5963002864).

Almost surely, 2^80561959796 is an apocalyptic number.

It is an amenable number.

80561959796 is a deficient number, since it is larger than the sum of its proper divisors (62550108940).

80561959796 is a wasteful number, since it uses less digits than its factorization.

80561959796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984359 (or 984357 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 65.

The spelling of 80561959796 in words is "eighty billion, five hundred sixty-one million, nine hundred fifty-nine thousand, seven hundred ninety-six".