513204230640 has 40 divisors (see below), whose sum is σ = 1590933115728. Its totient is φ = 136854461440.

The previous prime is 513204230629. The next prime is 513204230659. The reversal of 513204230640 is 46032402315.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 513204230598 and 513204230607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069175241 + ... + 1069175720.

Almost surely, 2^513204230640 is an apocalyptic number.

It is an amenable number.

513204230640 is an abundant number, since it is smaller than the sum of its proper divisors (1077728885088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513204230640 is a wasteful number, since it uses less digits than its factorization.

513204230640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138350977 (or 2138350971 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 513204230640 its reverse (46032402315), we get a palindrome (559236632955).

The spelling of 513204230640 in words is "five hundred thirteen billion, two hundred four million, two hundred thirty thousand, six hundred forty".