91211011148 has 24 divisors (see below), whose sum is σ = 161114997792. Its totient is φ = 45179524224.

The previous prime is 91211011147. The next prime is 91211011231. The reversal of 91211011148 is 84111011219.

It is a self number, because there is not a number n which added to its sum of digits gives 91211011148.

It is not an unprimeable number, because it can be changed into a prime (91211011141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95990 + ... + 437762.

It is an arithmetic number, because the mean of its divisors is an integer number (6713124908).

Almost surely, 2^91211011148 is an apocalyptic number.

It is an amenable number.

91211011148 is a deficient number, since it is larger than the sum of its proper divisors (69903986644).

91211011148 is a wasteful number, since it uses less digits than its factorization.

91211011148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342401 (or 342399 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 91211011148 in words is "ninety-one billion, two hundred eleven million, eleven thousand, one hundred forty-eight".