91768595560 has 32 divisors (see below), whose sum is σ = 218625185160. Its totient is φ = 34548176896.

The previous prime is 91768595537. The next prime is 91768595563. The reversal of 91768595560 is 6559586719.

It can be written as a sum of positive squares in 4 ways, for example, as 79549946116 + 12218649444 = 282046^2 + 110538^2 .

It is not an unprimeable number, because it can be changed into a prime (91768595563) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 67476229 + ... + 67477588.

Almost surely, 2^91768595560 is an apocalyptic number.

It is an amenable number.

91768595560 is an abundant number, since it is smaller than the sum of its proper divisors (126856589600).

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

91768595560 is a wasteful number, since it uses less digits than its factorization.

91768595560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134953845 (or 134953841 counting only the distinct ones).

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 91768595560 in words is "ninety-one billion, seven hundred sixty-eight million, five hundred ninety-five thousand, five hundred sixty".