91004205455 has 16 divisors (see below), whose sum is σ = 113967048384. Its totient is φ = 69629472000.

The previous prime is 91004205449. The next prime is 91004205521. The reversal of 91004205455 is 55450240019.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-91004205455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 991157 + ... + 1079073.

It is an arithmetic number, because the mean of its divisors is an integer number (7122940524).

Almost surely, 2^91004205455 is an apocalyptic number.

91004205455 is a deficient number, since it is larger than the sum of its proper divisors (22962842929).

91004205455 is a wasteful number, since it uses less digits than its factorization.

91004205455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96946.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 91004205455 in words is "ninety-one billion, four million, two hundred five thousand, four hundred fifty-five".