91243583654399 has 16 divisors (see below), whose sum is σ = 101418275211264. Its totient is φ = 81382249072800.

The previous prime is 91243583654381. The next prime is 91243583654401. The reversal of 91243583654399 is 99345638534219.

It is a cyclic number.

It is not a de Polignac number, because 91243583654399 - 2⁸ = 91243583654143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91243583654599) 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, 33520334 + ... + 36140004.

It is an arithmetic number, because the mean of its divisors is an integer number (6338642200704).

Almost surely, 2^{91243583654399} is an apocalyptic number.

91243583654399 is a deficient number, since it is larger than the sum of its proper divisors (10174691556865).

91243583654399 is a wasteful number, since it uses less digits than its factorization.

91243583654399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679478.

The product of its digits is 755827200, while the sum is 71.

The spelling of 91243583654399 in words is "ninety-one trillion, two hundred forty-three billion, five hundred eighty-three million, six hundred fifty-four thousand, three hundred ninety-nine".