91680245912 has 16 divisors (see below), whose sum is σ = 172361325840. Its totient is φ = 45717225696.

The previous prime is 91680245887. The next prime is 91680245929. The reversal of 91680245912 is 21954208619.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15358988 + ... + 15364955.

It is an arithmetic number, because the mean of its divisors is an integer number (10772582865).

Almost surely, 2^91680245912 is an apocalyptic number.

It is an amenable number.

91680245912 is a deficient number, since it is larger than the sum of its proper divisors (80681079928).

91680245912 is a wasteful number, since it uses less digits than its factorization.

91680245912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30724322 (or 30724318 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 91680245912 in words is "ninety-one billion, six hundred eighty million, two hundred forty-five thousand, nine hundred twelve".