91097883567 has 24 divisors (see below), whose sum is σ = 132191879040. Its totient is φ = 60452851200.

The previous prime is 91097883511. The next prime is 91097883571. The reversal of 91097883567 is 76538879019.

It is not a de Polignac number, because 91097883567 - 2¹¹ = 91097881519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91097883467) 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 23 ways as a sum of consecutive naturals, for example, 1702363 + ... + 1755059.

It is an arithmetic number, because the mean of its divisors is an integer number (5507994960).

Almost surely, 2^91097883567 is an apocalyptic number.

91097883567 is a deficient number, since it is larger than the sum of its proper divisors (41093995473).

91097883567 is a wasteful number, since it uses less digits than its factorization.

91097883567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53583 (or 53580 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 91097883567 in words is "ninety-one billion, ninety-seven million, eight hundred eighty-three thousand, five hundred sixty-seven".