91810096650 has 384 divisors, whose sum is σ = 277082265600. Its totient is φ = 22273574400.

The previous prime is 91810096639. The next prime is 91810096787. The reversal of 91810096650 is 5669001819.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 91810096596 and 91810096605.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 70459899 + ... + 70461201.

It is an arithmetic number, because the mean of its divisors is an integer number (721568400).

Almost surely, 2^91810096650 is an apocalyptic number.

91810096650 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91810096650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138541132800).

91810096650 is an abundant number, since it is smaller than the sum of its proper divisors (185272168950).

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

91810096650 is a wasteful number, since it uses less digits than its factorization.

91810096650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 91810096650 in words is "ninety-one billion, eight hundred ten million, ninety-six thousand, six hundred fifty".