91508306616 has 96 divisors (see below), whose sum is σ = 261971424000. Its totient is φ = 28776347712.

The previous prime is 91508306611. The next prime is 91508306623. The reversal of 91508306616 is 61660380519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91508306611) 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 23 ways as a sum of consecutive naturals, for example, 187011 + ... + 466893.

It is an arithmetic number, because the mean of its divisors is an integer number (2728869000).

Almost surely, 2^91508306616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91508306616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130985712000).

91508306616 is an abundant number, since it is smaller than the sum of its proper divisors (170463117384).

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

91508306616 is a wasteful number, since it uses less digits than its factorization.

91508306616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280153 (or 280146 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 91508306616 in words is "ninety-one billion, five hundred eight million, three hundred six thousand, six hundred sixteen".