512426986639 has 4 divisors (see below), whose sum is σ = 530096882760. Its totient is φ = 494757090520.

The previous prime is 512426986637. The next prime is 512426986717. The reversal of 512426986639 is 936689624215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936689624215 = 5 ⋅187337924843.

It is a cyclic number.

It is not a de Polignac number, because 512426986639 - 2¹ = 512426986637 is a prime.

It is a super-3 number, since 3×512426986639³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512426986637) 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, 8834948017 + ... + 8834948074.

It is an arithmetic number, because the mean of its divisors is an integer number (132524220690).

Almost surely, 2^512426986639 is an apocalyptic number.

512426986639 is a deficient number, since it is larger than the sum of its proper divisors (17669896121).

512426986639 is a wasteful number, since it uses less digits than its factorization.

512426986639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17669896120.

The product of its digits is 33592320, while the sum is 61.

The spelling of 512426986639 in words is "five hundred twelve billion, four hundred twenty-six million, nine hundred eighty-six thousand, six hundred thirty-nine".