91045050583 has 4 divisors (see below), whose sum is σ = 91502563600. Its totient is φ = 90587537568.

The previous prime is 91045050563. The next prime is 91045050589. The reversal of 91045050583 is 38505054019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91045050583 - 2⁹ = 91045050071 is a prime.

It is a super-2 number, since 2×91045050583² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91045050589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228756210 + ... + 228756607.

It is an arithmetic number, because the mean of its divisors is an integer number (22875640900).

Almost surely, 2^91045050583 is an apocalyptic number.

91045050583 is a deficient number, since it is larger than the sum of its proper divisors (457513017).

91045050583 is a wasteful number, since it uses less digits than its factorization.

91045050583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457513016.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 91045050583 in words is "ninety-one billion, forty-five million, fifty thousand, five hundred eighty-three".