91601715111 has 32 divisors (see below), whose sum is σ = 130547386368. Its totient is φ = 56930764800.

The previous prime is 91601715103. The next prime is 91601715113. The reversal of 91601715111 is 11151710619.

It is not a de Polignac number, because 91601715111 - 2³ = 91601715103 is a prime.

It is a super-2 number, since 2×91601715111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91601715113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11239540 + ... + 11247686.

It is an arithmetic number, because the mean of its divisors is an integer number (4079605824).

Almost surely, 2^91601715111 is an apocalyptic number.

91601715111 is a deficient number, since it is larger than the sum of its proper divisors (38945671257).

91601715111 is a wasteful number, since it uses less digits than its factorization.

91601715111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10231.

The product of its (nonzero) digits is 1890, while the sum is 33.

It can be divided in two parts, 9160 and 1715111, that added together give a palindrome (1724271).

The spelling of 91601715111 in words is "ninety-one billion, six hundred one million, seven hundred fifteen thousand, one hundred eleven".