80659919780 has 48 divisors (see below), whose sum is σ = 184957940160. Its totient is φ = 29303356800.

The previous prime is 80659919777. The next prime is 80659919801. The reversal of 80659919780 is 8791995608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63695 + ... + 406665.

It is an arithmetic number, because the mean of its divisors is an integer number (3853290420).

Almost surely, 2^80659919780 is an apocalyptic number.

It is an amenable number.

80659919780 is an abundant number, since it is smaller than the sum of its proper divisors (104298020380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80659919780 is a wasteful number, since it uses less digits than its factorization.

80659919780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344060 (or 344058 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 62.

The spelling of 80659919780 in words is "eighty billion, six hundred fifty-nine million, nine hundred nineteen thousand, seven hundred eighty".