91435849938 has 48 divisors (see below), whose sum is σ = 200705182080. Its totient is φ = 30079846368.

The previous prime is 91435849937. The next prime is 91435849963. The reversal of 91435849938 is 83994853419.

91435849938 is a `hidden beast` number, since 9 + 1 + 43 + 584 + 9 + 9 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (91435849937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3623481 + ... + 3648627.

It is an arithmetic number, because the mean of its divisors is an integer number (4181357960).

Almost surely, 2^91435849938 is an apocalyptic number.

91435849938 is an abundant number, since it is smaller than the sum of its proper divisors (109269332142).

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

91435849938 is a wasteful number, since it uses less digits than its factorization.

91435849938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27791 (or 27788 counting only the distinct ones).

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

The spelling of 91435849938 in words is "ninety-one billion, four hundred thirty-five million, eight hundred forty-nine thousand, nine hundred thirty-eight".