613405640 has 32 divisors (see below), whose sum is σ = 1381570560. Its totient is φ = 245112000.

The previous prime is 613405619. The next prime is 613405657. The reversal of 613405640 is 46504316.

It is a happy number.

613405640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 34745 + ... + 49335.

It is an arithmetic number, because the mean of its divisors is an integer number (43174080).

Almost surely, 2^613405640 is an apocalyptic number.

It is an amenable number.

613405640 is an abundant number, since it is smaller than the sum of its proper divisors (768164920).

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

613405640 is a wasteful number, since it uses less digits than its factorization.

613405640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15653 (or 15649 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 613405640 is about 24767.0272741805. The cubic root of 613405640 is about 849.6679856707.

Adding to 613405640 its reverse (46504316), we get a palindrome (659909956).

The spelling of 613405640 in words is "six hundred thirteen million, four hundred five thousand, six hundred forty".