91680656116550 has 24 divisors (see below), whose sum is σ = 170789584610736. Its totient is φ = 36615581966240.

The previous prime is 91680656116547. The next prime is 91680656116591. The reversal of 91680656116550 is 5561165608619.

It is a happy number.

It is a super-2 number, since 2×91680656116550² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91680656116550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1416979337 + ... + 1417044036.

It is an arithmetic number, because the mean of its divisors is an integer number (7116232692114).

Almost surely, 2^{91680656116550} is an apocalyptic number.

91680656116550 is a deficient number, since it is larger than the sum of its proper divisors (79108928494186).

91680656116550 is a wasteful number, since it uses less digits than its factorization.

91680656116550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834024032 (or 2834024027 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 59.

The spelling of 91680656116550 in words is "ninety-one trillion, six hundred eighty billion, six hundred fifty-six million, one hundred sixteen thousand, five hundred fifty".