513433610642 has 4 divisors (see below), whose sum is σ = 770150415966. Its totient is φ = 256716805320.

The previous prime is 513433610629. The next prime is 513433610663. The reversal of 513433610642 is 246016334315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246016334315 = 5 ⋅49203266863.

It can be written as a sum of positive squares in only one way, i.e., 375963959281 + 137469651361 = 613159^2 + 370769^2 .

It is a super-2 number, since 2×513433610642² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513433610596 and 513433610605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128358402659 + ... + 128358402662.

Almost surely, 2^513433610642 is an apocalyptic number.

513433610642 is a deficient number, since it is larger than the sum of its proper divisors (256716805324).

513433610642 is a wasteful number, since it uses less digits than its factorization.

513433610642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256716805323.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 513433610642 its reverse (246016334315), we get a palindrome (759449944957).

The spelling of 513433610642 in words is "five hundred thirteen billion, four hundred thirty-three million, six hundred ten thousand, six hundred forty-two".