502538774989 has 4 divisors (see below), whose sum is σ = 502890448060. Its totient is φ = 502187101920.

The previous prime is 502538774957. The next prime is 502538775019. The reversal of 502538774989 is 989477835205.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989477835205 = 5 ⋅197895567041.

It can be written as a sum of positive squares in 2 ways, for example, as 219695626089 + 282843148900 = 468717^2 + 531830^2 .

It is a cyclic number.

It is not a de Polignac number, because 502538774989 - 2⁵ = 502538774957 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 (502538774939) 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, 175834392 + ... + 175837249.

It is an arithmetic number, because the mean of its divisors is an integer number (125722612015).

Almost surely, 2^502538774989 is an apocalyptic number.

It is an amenable number.

502538774989 is a deficient number, since it is larger than the sum of its proper divisors (351673071).

502538774989 is a wasteful number, since it uses less digits than its factorization.

502538774989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351673070.

The product of its (nonzero) digits is 152409600, while the sum is 67.

The spelling of 502538774989 in words is "five hundred two billion, five hundred thirty-eight million, seven hundred seventy-four thousand, nine hundred eighty-nine".