613660645326 has 64 divisors (see below), whose sum is σ = 1263316455936. Its totient is φ = 198637046400.

The previous prime is 613660645313. The next prime is 613660645327. The reversal of 613660645326 is 623546066316.

613660645326 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613660645327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40177071 + ... + 40192341.

It is an arithmetic number, because the mean of its divisors is an integer number (19739319624).

Almost surely, 2^613660645326 is an apocalyptic number.

613660645326 is an abundant number, since it is smaller than the sum of its proper divisors (649655810610).

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

613660645326 is a wasteful number, since it uses less digits than its factorization.

613660645326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16617.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 613660645326 in words is "six hundred thirteen billion, six hundred sixty million, six hundred forty-five thousand, three hundred twenty-six".