91840454087 has 8 divisors (see below), whose sum is σ = 92453802480. Its totient is φ = 91228979520.

The previous prime is 91840453927. The next prime is 91840454089. The reversal of 91840454087 is 78045404819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91840454087 - 2¹⁰ = 91840453063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91840454089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370037 + ... + 566222.

It is an arithmetic number, because the mean of its divisors is an integer number (11556725310).

Almost surely, 2^91840454087 is an apocalyptic number.

91840454087 is a deficient number, since it is larger than the sum of its proper divisors (613348393).

91840454087 is a wasteful number, since it uses less digits than its factorization.

91840454087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936913.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 91840454087 in words is "ninety-one billion, eight hundred forty million, four hundred fifty-four thousand, eighty-seven".