519128642 has 6 divisors (see below), whose sum is σ = 778741299. Its totient is φ = 259548210.

The previous prime is 519128639. The next prime is 519128651. The reversal of 519128642 is 246821915.

It can be written as a sum of positive squares in only one way, i.e., 259564321 + 259564321 = 16111^2 + 16111^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=16111.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 519128596 and 519128605.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 24167 + ... + 40277.

Almost surely, 2^519128642 is an apocalyptic number.

519128642 is a deficient number, since it is larger than the sum of its proper divisors (259612657).

519128642 is an frugal number, since it uses more digits than its factorization.

519128642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32224 (or 16113 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 519128642 is about 22784.3947033929. The cubic root of 519128642 is about 803.6957350127.

It can be divided in two parts, 5191 and 28642, that added together give a palindrome (33833).

The spelling of 519128642 in words is "five hundred nineteen million, one hundred twenty-eight thousand, six hundred forty-two".