91039118616 has 40 divisors (see below), whose sum is σ = 254993829420. Its totient is φ = 30346372656.

The previous prime is 91039118561. The next prime is 91039118617. The reversal of 91039118616 is 61681193019.

91039118616 is a `hidden beast` number, since 9 + 10 + 3 + 9 + 1 + 18 + 616 = 666.

It is a super-3 number, since 3×91039118616³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91039118617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 70245586 + ... + 70246881.

Almost surely, 2^91039118616 is an apocalyptic number.

It is an amenable number.

91039118616 is an abundant number, since it is smaller than the sum of its proper divisors (163954710804).

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

91039118616 is a wasteful number, since it uses less digits than its factorization.

91039118616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140492485 (or 140492472 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 91039118616 in words is "ninety-one billion, thirty-nine million, one hundred eighteen thousand, six hundred sixteen".