91816542 has 24 divisors (see below), whose sum is σ = 199270344. Its totient is φ = 30554064.

The previous prime is 91816537. The next prime is 91816559. The reversal of 91816542 is 24561819.

It is a junction number, because it is equal to n+sod(n) for n = 91816497 and 91816506.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7608 + ... + 15540.

It is an arithmetic number, because the mean of its divisors is an integer number (8302931).

Almost surely, 2^91816542 is an apocalyptic number.

91816542 is an abundant number, since it is smaller than the sum of its proper divisors (107453802).

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

91816542 is a wasteful number, since it uses less digits than its factorization.

91816542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8584 (or 8581 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 91816542 is about 9582.0948649030. The cubic root of 91816542 is about 451.1354732211.

The spelling of 91816542 in words is "ninety-one million, eight hundred sixteen thousand, five hundred forty-two".