91153491605 has 16 divisors (see below), whose sum is σ = 119334297600. Its totient is φ = 66290064960.

The previous prime is 91153491599. The next prime is 91153491607. The reversal of 91153491605 is 50619435119.

It is not a de Polignac number, because 91153491605 - 2⁴ = 91153491589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91153491607) 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, 1668716 + ... + 1722474.

It is an arithmetic number, because the mean of its divisors is an integer number (7458393600).

Almost surely, 2^91153491605 is an apocalyptic number.

It is an amenable number.

91153491605 is a deficient number, since it is larger than the sum of its proper divisors (28180805995).

91153491605 is a wasteful number, since it uses less digits than its factorization.

91153491605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84604.

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 91153491605 in words is "ninety-one billion, one hundred fifty-three million, four hundred ninety-one thousand, six hundred five".