80685785898 has 48 divisors (see below), whose sum is σ = 178055953920. Its totient is φ = 26401239072.

The previous prime is 80685785879. The next prime is 80685785933. The reversal of 80685785898 is 89858758608.

It is a happy number.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 82015 + ... + 409997.

It is an arithmetic number, because the mean of its divisors is an integer number (3709499040).

Almost surely, 2^80685785898 is an apocalyptic number.

80685785898 is an abundant number, since it is smaller than the sum of its proper divisors (97370168022).

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

80685785898 is a wasteful number, since it uses less digits than its factorization.

80685785898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328243 (or 328240 counting only the distinct ones).

The product of its (nonzero) digits is 309657600, while the sum is 72.

The spelling of 80685785898 in words is "eighty billion, six hundred eighty-five million, seven hundred eighty-five thousand, eight hundred ninety-eight".