91111067061 has 64 divisors (see below), whose sum is σ = 157659955200. Its totient is φ = 45545849856.

The previous prime is 91111067059. The next prime is 91111067063. The reversal of 91111067061 is 16076011119.

It is an interprime number because it is at equal distance from previous prime (91111067059) and next prime (91111067063).

It is not a de Polignac number, because 91111067061 - 2¹ = 91111067059 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 (91111067063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 232780 + ... + 486218.

It is an arithmetic number, because the mean of its divisors is an integer number (2463436800).

Almost surely, 2^91111067061 is an apocalyptic number.

It is an amenable number.

91111067061 is a deficient number, since it is larger than the sum of its proper divisors (66548888139).

91111067061 is a wasteful number, since it uses less digits than its factorization.

91111067061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253538.

The product of its (nonzero) digits is 2268, while the sum is 33.

The spelling of 91111067061 in words is "ninety-one billion, one hundred eleven million, sixty-seven thousand, sixty-one".