91918068460 has 48 divisors (see below), whose sum is σ = 194102225856. Its totient is φ = 36562787072.

The previous prime is 91918068449. The next prime is 91918068461. The reversal of 91918068460 is 6486081919.

It is a junction number, because it is equal to n+sod(n) for n = 91918068398 and 91918068407.

It is not an unprimeable number, because it can be changed into a prime (91918068461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10606089 + ... + 10614751.

It is an arithmetic number, because the mean of its divisors is an integer number (4043796372).

Almost surely, 2^91918068460 is an apocalyptic number.

It is an amenable number.

91918068460 is an abundant number, since it is smaller than the sum of its proper divisors (102184157396).

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

91918068460 is a wasteful number, since it uses less digits than its factorization.

91918068460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11562 (or 11560 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 91918068460 in words is "ninety-one billion, nine hundred eighteen million, sixty-eight thousand, four hundred sixty".