506138381773 has 4 divisors (see below), whose sum is σ = 506214237148. Its totient is φ = 506062526400.

The previous prime is 506138381767. The next prime is 506138381783. The reversal of 506138381773 is 377183831605.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25497063684 + 480641318089 = 159678^2 + 693283^2 .

It is a cyclic number.

It is not a de Polignac number, because 506138381773 - 2¹³ = 506138373581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 506138381773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506138381753) 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, 37917678 + ... + 37931023.

It is an arithmetic number, because the mean of its divisors is an integer number (126553559287).

Almost surely, 2^506138381773 is an apocalyptic number.

It is an amenable number.

506138381773 is a deficient number, since it is larger than the sum of its proper divisors (75855375).

506138381773 is an equidigital number, since it uses as much as digits as its factorization.

506138381773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75855374.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 506138381773 in words is "five hundred six billion, one hundred thirty-eight million, three hundred eighty-one thousand, seven hundred seventy-three".