512259666139 has 4 divisors (see below), whose sum is σ = 551664255856. Its totient is φ = 472855076424.

The previous prime is 512259666103. The next prime is 512259666227. The reversal of 512259666139 is 931666952215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931666952215 = 5 ⋅186333390443.

It is a cyclic number.

It is not a de Polignac number, because 512259666139 - 2¹⁵ = 512259633371 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 512259666139.

It is not an unprimeable number, because it can be changed into a prime (512259669139) 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, 19702294839 + ... + 19702294864.

It is an arithmetic number, because the mean of its divisors is an integer number (137916063964).

Almost surely, 2^512259666139 is an apocalyptic number.

512259666139 is a deficient number, since it is larger than the sum of its proper divisors (39404589717).

512259666139 is a wasteful number, since it uses less digits than its factorization.

512259666139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39404589716.

The product of its digits is 5248800, while the sum is 55.

The spelling of 512259666139 in words is "five hundred twelve billion, two hundred fifty-nine million, six hundred sixty-six thousand, one hundred thirty-nine".