91543856 has 20 divisors (see below), whose sum is σ = 177647112. Its totient is φ = 45699456.

The previous prime is 91543853. The next prime is 91543867. The reversal of 91543856 is 65834519.

It is not an unprimeable number, because it can be changed into a prime (91543853) 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 3 ways as a sum of consecutive naturals, for example, 6740 + ... + 15116.

Almost surely, 2^91543856 is an apocalyptic number.

It is an amenable number.

91543856 is a deficient number, since it is larger than the sum of its proper divisors (86103256).

91543856 is a wasteful number, since it uses less digits than its factorization.

91543856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9068 (or 9062 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 91543856 is about 9567.8553500772. The cubic root of 91543856 is about 450.6884211962.

The spelling of 91543856 in words is "ninety-one million, five hundred forty-three thousand, eight hundred fifty-six".