512105239885 has 4 divisors (see below), whose sum is σ = 614526287868. Its totient is φ = 409684191904.

The previous prime is 512105239879. The next prime is 512105239907. The reversal of 512105239885 is 588932501215.

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 59878579401 + 452226660484 = 244701^2 + 672478^2 .

It is a cyclic number.

It is not a de Polignac number, because 512105239885 - 2⁷ = 512105239757 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51210523984 + ... + 51210523993.

It is an arithmetic number, because the mean of its divisors is an integer number (153631571967).

Almost surely, 2^512105239885 is an apocalyptic number.

It is an amenable number.

512105239885 is a deficient number, since it is larger than the sum of its proper divisors (102421047983).

512105239885 is a wasteful number, since it uses less digits than its factorization.

512105239885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102421047982.

The product of its (nonzero) digits is 864000, while the sum is 49.

The spelling of 512105239885 in words is "five hundred twelve billion, one hundred five million, two hundred thirty-nine thousand, eight hundred eighty-five".