613544641 has 2 divisors, whose sum is σ = 613544642. Its totient is φ = 613544640.

The previous prime is 613544609. The next prime is 613544663. The reversal of 613544641 is 146445316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335622400 + 277922241 = 18320^2 + 16671^2 .

It is a cyclic number.

It is not a de Polignac number, because 613544641 - 2⁵ = 613544609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 613544597 and 613544606.

It is not a weakly prime, because it can be changed into another prime (613541641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306772320 + 306772321.

It is an arithmetic number, because the mean of its divisors is an integer number (306772321).

Almost surely, 2^613544641 is an apocalyptic number.

It is an amenable number.

613544641 is a deficient number, since it is larger than the sum of its proper divisors (1).

613544641 is an equidigital number, since it uses as much as digits as its factorization.

613544641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 613544641 is about 24769.8332856723. The cubic root of 613544641 is about 849.7321605940.

Adding to 613544641 its reverse (146445316), we get a palindrome (759989957).

The spelling of 613544641 in words is "six hundred thirteen million, five hundred forty-four thousand, six hundred forty-one".