613555440013 has 2 divisors, whose sum is σ = 613555440014. Its totient is φ = 613555440012.

The previous prime is 613555439953. The next prime is 613555440023. The reversal of 613555440013 is 310044555316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536991443209 + 76563996804 = 732797^2 + 276702^2 .

It is a cyclic number.

It is not a de Polignac number, because 613555440013 - 2²¹ = 613553342861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613555440023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306777720006 + 306777720007.

It is an arithmetic number, because the mean of its divisors is an integer number (306777720007).

Almost surely, 2^613555440013 is an apocalyptic number.

It is an amenable number.

613555440013 is a deficient number, since it is larger than the sum of its proper divisors (1).

613555440013 is an equidigital number, since it uses as much as digits as its factorization.

613555440013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 613555440013 its reverse (310044555316), we get a palindrome (923599995329).

The spelling of 613555440013 in words is "six hundred thirteen billion, five hundred fifty-five million, four hundred forty thousand, thirteen".