613643623530 has 64 divisors (see below), whose sum is σ = 1683728805888. Its totient is φ = 140212065600.

The previous prime is 613643623511. The next prime is 613643623583. The reversal of 613643623530 is 35326346316.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86239 + ... + 1111181.

It is an arithmetic number, because the mean of its divisors is an integer number (26308262592).

Almost surely, 2^613643623530 is an apocalyptic number.

613643623530 is an abundant number, since it is smaller than the sum of its proper divisors (1070085182358).

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

613643623530 is a wasteful number, since it uses less digits than its factorization.

613643623530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027811.

The product of its (nonzero) digits is 699840, while the sum is 42.

Adding to 613643623530 its reverse (35326346316), we get a palindrome (648969969846).

The spelling of 613643623530 in words is "six hundred thirteen billion, six hundred forty-three million, six hundred twenty-three thousand, five hundred thirty".