91444894882 has 16 divisors (see below), whose sum is σ = 149645244672. Its totient is φ = 41563599120.

The previous prime is 91444894817. The next prime is 91444894883. The reversal of 91444894882 is 28849844419.

It is a self number, because there is not a number n which added to its sum of digits gives 91444894882.

It is not an unprimeable number, because it can be changed into a prime (91444894883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340783 + ... + 546829.

It is an arithmetic number, because the mean of its divisors is an integer number (9352827792).

Almost surely, 2^91444894882 is an apocalyptic number.

91444894882 is a deficient number, since it is larger than the sum of its proper divisors (58200349790).

91444894882 is a wasteful number, since it uses less digits than its factorization.

91444894882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226233.

The product of its digits is 21233664, while the sum is 61.

The spelling of 91444894882 in words is "ninety-one billion, four hundred forty-four million, eight hundred ninety-four thousand, eight hundred eighty-two".