91228545627 has 16 divisors (see below), whose sum is σ = 123596099328. Its totient is φ = 59847400800.

The previous prime is 91228545607. The next prime is 91228545637. The reversal of 91228545627 is 72654582219.

It is not a de Polignac number, because 91228545627 - 2⁶ = 91228545563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91228545627.

It is not an unprimeable number, because it can be changed into a prime (91228545607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874183 + ... + 972960.

It is an arithmetic number, because the mean of its divisors is an integer number (7724756208).

Almost surely, 2^91228545627 is an apocalyptic number.

91228545627 is a deficient number, since it is larger than the sum of its proper divisors (32367553701).

91228545627 is a wasteful number, since it uses less digits than its factorization.

91228545627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847410.

The product of its digits is 2419200, while the sum is 51.

The spelling of 91228545627 in words is "ninety-one billion, two hundred twenty-eight million, five hundred forty-five thousand, six hundred twenty-seven".