91555050550 has 24 divisors (see below), whose sum is σ = 170344289232. Its totient is φ = 36610860000.

The previous prime is 91555050539. The next prime is 91555050551. The reversal of 91555050550 is 5505055519.

It is a super-3 number, since 3×91555050550³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91555050551) 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 11 ways as a sum of consecutive naturals, for example, 112306 + ... + 442405.

It is an arithmetic number, because the mean of its divisors is an integer number (7097678718).

Almost surely, 2^91555050550 is an apocalyptic number.

91555050550 is a deficient number, since it is larger than the sum of its proper divisors (78789238682).

91555050550 is a wasteful number, since it uses less digits than its factorization.

91555050550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558024 (or 558019 counting only the distinct ones).

The product of its (nonzero) digits is 140625, while the sum is 40.

The spelling of 91555050550 in words is "ninety-one billion, five hundred fifty-five million, fifty thousand, five hundred fifty".