91550117756 has 24 divisors (see below), whose sum is σ = 162748503120. Its totient is φ = 45051760512.

The previous prime is 91550117707. The next prime is 91550117767. The reversal of 91550117756 is 65771105519.

It is a happy number.

It is a super-2 number, since 2×91550117756² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91550117756.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151286 + ... + 453858.

It is an arithmetic number, because the mean of its divisors is an integer number (6781187630).

Almost surely, 2^91550117756 is an apocalyptic number.

It is a pronic number, being equal to 302572×302573.

It is an amenable number.

91550117756 is a deficient number, since it is larger than the sum of its proper divisors (71198385364).

91550117756 is a wasteful number, since it uses less digits than its factorization.

91550117756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303773 (or 303771 counting only the distinct ones).

The product of its (nonzero) digits is 330750, while the sum is 47.

The spelling of 91550117756 in words is "ninety-one billion, five hundred fifty million, one hundred seventeen thousand, seven hundred fifty-six".