91866911382 has 24 divisors (see below), whose sum is σ = 199081242360. Its totient is φ = 30616724160.

The previous prime is 91866911369. The next prime is 91866911387. The reversal of 91866911382 is 28311966819.

It is a super-2 number, since 2×91866911382² (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 (91866911387) 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 11 ways as a sum of consecutive naturals, for example, 362832 + ... + 561587.

It is an arithmetic number, because the mean of its divisors is an integer number (8295051765).

Almost surely, 2^91866911382 is an apocalyptic number.

91866911382 is an abundant number, since it is smaller than the sum of its proper divisors (107214330978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91866911382 is a wasteful number, since it uses less digits than its factorization.

91866911382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929948 (or 929945 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 91866911382 in words is "ninety-one billion, eight hundred sixty-six million, nine hundred eleven thousand, three hundred eighty-two".