613419181961 has 2 divisors, whose sum is σ = 613419181962. Its totient is φ = 613419181960.

The previous prime is 613419181801. The next prime is 613419182011. The reversal of 613419181961 is 169181914316.

613419181961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (613419182011) can be obtained adding 613419181961 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381306250000 + 232112931961 = 617500^2 + 481781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613419181961 is a prime.

It is not a weakly prime, because it can be changed into another prime (613419181561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306709590980 + 306709590981.

It is an arithmetic number, because the mean of its divisors is an integer number (306709590981).

Almost surely, 2^613419181961 is an apocalyptic number.

It is an amenable number.

613419181961 is a deficient number, since it is larger than the sum of its proper divisors (1).

613419181961 is an equidigital number, since it uses as much as digits as its factorization.

613419181961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 50.

The spelling of 613419181961 in words is "six hundred thirteen billion, four hundred nineteen million, one hundred eighty-one thousand, nine hundred sixty-one".