513331400644 has 12 divisors (see below), whose sum is σ = 898347568300. Its totient is φ = 256660666848.

The previous prime is 513331400629. The next prime is 513331400653. The reversal of 513331400644 is 446004133315.

It can be written as a sum of positive squares in 2 ways, for example, as 446437785600 + 66893615044 = 668160^2 + 258638^2 .

It is a super-2 number, since 2×513331400644² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1024059 + ... + 1440610.

Almost surely, 2^513331400644 is an apocalyptic number.

It is an amenable number.

513331400644 is a deficient number, since it is larger than the sum of its proper divisors (385016167656).

513331400644 is a wasteful number, since it uses less digits than its factorization.

513331400644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516742 (or 2516740 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 513331400644 its reverse (446004133315), we get a palindrome (959335533959).

The spelling of 513331400644 in words is "five hundred thirteen billion, three hundred thirty-one million, four hundred thousand, six hundred forty-four".