91055480173 has 16 divisors (see below), whose sum is σ = 104681267200. Its totient is φ = 77584872816.

The previous prime is 91055480141. The next prime is 91055480207. The reversal of 91055480173 is 37108455019.

It is a cyclic number.

It is not a de Polignac number, because 91055480173 - 2⁵ = 91055480141 is a prime.

It is a super-2 number, since 2×91055480173² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91055481173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1535236 + ... + 1593442.

It is an arithmetic number, because the mean of its divisors is an integer number (6542579200).

Almost surely, 2^91055480173 is an apocalyptic number.

It is an amenable number.

91055480173 is a deficient number, since it is larger than the sum of its proper divisors (13625787027).

91055480173 is a wasteful number, since it uses less digits than its factorization.

91055480173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59536.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 91055480173 in words is "ninety-one billion, fifty-five million, four hundred eighty thousand, one hundred seventy-three".