91986264945 has 24 divisors (see below), whose sum is σ = 159525580032. Its totient is φ = 49033888800.

The previous prime is 91986264941. The next prime is 91986264947. The reversal of 91986264945 is 54946268919.

It is not a de Polignac number, because 91986264945 - 2² = 91986264941 is a prime.

It is a super-2 number, since 2×91986264945² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91986264941) 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 23 ways as a sum of consecutive naturals, for example, 442401 + ... + 616190.

It is an arithmetic number, because the mean of its divisors is an integer number (6646899168).

Almost surely, 2^91986264945 is an apocalyptic number.

It is an amenable number.

91986264945 is a deficient number, since it is larger than the sum of its proper divisors (67539315087).

91986264945 is a wasteful number, since it uses less digits than its factorization.

91986264945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060533 (or 1060530 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The spelling of 91986264945 in words is "ninety-one billion, nine hundred eighty-six million, two hundred sixty-four thousand, nine hundred forty-five".