91380097605 has 16 divisors (see below), whose sum is σ = 148966801920. Its totient is φ = 47816503488.

The previous prime is 91380097591. The next prime is 91380097609. The reversal of 91380097605 is 50679008319.

It is not a de Polignac number, because 91380097605 - 2¹¹ = 91380095557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91380097609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57470965 + ... + 57472554.

It is an arithmetic number, because the mean of its divisors is an integer number (9310425120).

Almost surely, 2^91380097605 is an apocalyptic number.

It is an amenable number.

91380097605 is a deficient number, since it is larger than the sum of its proper divisors (57586704315).

91380097605 is a wasteful number, since it uses less digits than its factorization.

91380097605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114943580.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 91380097605 in words is "ninety-one billion, three hundred eighty million, ninety-seven thousand, six hundred five".