91838365545 has 32 divisors (see below), whose sum is σ = 153371808000. Its totient is φ = 46838145024.

The previous prime is 91838365537. The next prime is 91838365559. The reversal of 91838365545 is 54556383819.

It is not a de Polignac number, because 91838365545 - 2³ = 91838365537 is a prime.

It is a super-3 number, since 3×91838365545³ (a number of 34 digits) contains 333 as substring.

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 31 ways as a sum of consecutive naturals, for example, 1307481 + ... + 1375929.

It is an arithmetic number, because the mean of its divisors is an integer number (4792869000).

Almost surely, 2^91838365545 is an apocalyptic number.

It is an amenable number.

91838365545 is a deficient number, since it is larger than the sum of its proper divisors (61533442455).

91838365545 is a wasteful number, since it uses less digits than its factorization.

91838365545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72369.

The product of its digits is 15552000, while the sum is 57.

The spelling of 91838365545 in words is "ninety-one billion, eight hundred thirty-eight million, three hundred sixty-five thousand, five hundred forty-five".