91135796976 has 480 divisors, whose sum is σ = 316963046400. Its totient is φ = 25321330944.

The previous prime is 91135796933. The next prime is 91135797083. The reversal of 91135796976 is 67969753119.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 49341685 + ... + 49343531.

It is an arithmetic number, because the mean of its divisors is an integer number (660339680).

Almost surely, 2^91135796976 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 91135796976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158481523200).

91135796976 is an abundant number, since it is smaller than the sum of its proper divisors (225827249424).

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

91135796976 is a wasteful number, since it uses less digits than its factorization.

91135796976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928 (or 1896 counting only the distinct ones).

The product of its digits is 19289340, while the sum is 63.

The spelling of 91135796976 in words is "ninety-one billion, one hundred thirty-five million, seven hundred ninety-six thousand, nine hundred seventy-six".