505504600091 has 4 divisors (see below), whose sum is σ = 505521747384. Its totient is φ = 505487452800.

The previous prime is 505504600057. The next prime is 505504600163. The reversal of 505504600091 is 190006405505.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505504600091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505504600891) 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, 8529350 + ... + 8588411.

It is an arithmetic number, because the mean of its divisors is an integer number (126380436846).

Almost surely, 2^505504600091 is an apocalyptic number.

505504600091 is a deficient number, since it is larger than the sum of its proper divisors (17147293).

505504600091 is a wasteful number, since it uses less digits than its factorization.

505504600091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17147292.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 505504600091 in words is "five hundred five billion, five hundred four million, six hundred thousand, ninety-one".