505994681893 has 16 divisors (see below), whose sum is σ = 534415190400. Its totient is φ = 477755046720.

The previous prime is 505994681887. The next prime is 505994681909. The reversal of 505994681893 is 398186499505.

It is a cyclic number.

It is not a de Polignac number, because 505994681893 - 2²⁵ = 505961127461 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 (505994681873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9604203 + ... + 9656743.

It is an arithmetic number, because the mean of its divisors is an integer number (33400949400).

Almost surely, 2^505994681893 is an apocalyptic number.

It is an amenable number.

505994681893 is a deficient number, since it is larger than the sum of its proper divisors (28420508507).

505994681893 is a wasteful number, since it uses less digits than its factorization.

505994681893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54252.

The product of its (nonzero) digits is 83980800, while the sum is 67.

The spelling of 505994681893 in words is "five hundred five billion, nine hundred ninety-four million, six hundred eighty-one thousand, eight hundred ninety-three".