91187519094609 has 48 divisors (see below), whose sum is σ = 142961935686336. Its totient is φ = 51545044656000.

The previous prime is 91187519094571. The next prime is 91187519094613. The reversal of 91187519094609 is 90649091578119.

It is not a de Polignac number, because 91187519094609 - 2⁹ = 91187519094097 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91187519094619) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13834854 + ... + 19333344.

It is an arithmetic number, because the mean of its divisors is an integer number (2978373660132).

Almost surely, 2^{91187519094609} is an apocalyptic number.

It is an amenable number.

91187519094609 is a deficient number, since it is larger than the sum of its proper divisors (51774416591727).

91187519094609 is a wasteful number, since it uses less digits than its factorization.

91187519094609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499726 (or 5499719 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 69.

The spelling of 91187519094609 in words is "ninety-one trillion, one hundred eighty-seven billion, five hundred nineteen million, ninety-four thousand, six hundred nine".