91368831708 has 720 divisors, whose sum is σ = 319095608832. Its totient is φ = 22128940800.

The previous prime is 91368831683. The next prime is 91368831709. The reversal of 91368831708 is 80713886319.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91368831709) 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 239 ways as a sum of consecutive naturals, for example, 887075985 + ... + 887076087.

Almost surely, 2^91368831708 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 91368831708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159547804416).

91368831708 is an abundant number, since it is smaller than the sum of its proper divisors (227726777124).

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

91368831708 is a wasteful number, since it uses less digits than its factorization.

91368831708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 91368831708 in words is "ninety-one billion, three hundred sixty-eight million, eight hundred thirty-one thousand, seven hundred eight".