91545552605 has 32 divisors (see below), whose sum is σ = 121093056000. Its totient is φ = 66016161792.

The previous prime is 91545552599. The next prime is 91545552607. The reversal of 91545552605 is 50625554519.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 91545552605 - 2⁴ = 91545552589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 91545552605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91545552607) 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 31 ways as a sum of consecutive naturals, for example, 1338326 + ... + 1405064.

It is an arithmetic number, because the mean of its divisors is an integer number (3784158000).

Almost surely, 2^91545552605 is an apocalyptic number.

It is an amenable number.

91545552605 is a deficient number, since it is larger than the sum of its proper divisors (29547503395).

91545552605 is a wasteful number, since it uses less digits than its factorization.

91545552605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67253.

The product of its (nonzero) digits is 1350000, while the sum is 47.

The spelling of 91545552605 in words is "ninety-one billion, five hundred forty-five million, five hundred fifty-two thousand, six hundred five".