91768720048 has 40 divisors (see below), whose sum is σ = 178265496528. Its totient is φ = 45764877312.

The previous prime is 91768720037. The next prime is 91768720061. The reversal of 91768720048 is 84002786719.

It is a junction number, because it is equal to n+sod(n) for n = 91768719977 and 91768720004.

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, 11477140 + ... + 11485132.

Almost surely, 2^91768720048 is an apocalyptic number.

It is an amenable number.

91768720048 is a deficient number, since it is larger than the sum of its proper divisors (86496776480).

91768720048 is a wasteful number, since it uses less digits than its factorization.

91768720048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9781 (or 9775 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 91768720048 in words is "ninety-one billion, seven hundred sixty-eight million, seven hundred twenty thousand, forty-eight".