1613365555897 has 2 divisors, whose sum is σ = 1613365555898. Its totient is φ = 1613365555896.

The previous prime is 1613365555873. The next prime is 1613365555973. The reversal of 1613365555897 is 7985555633161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1131381104896 + 481984451001 = 1063664^2 + 694251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613365555897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1613365555847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806682777948 + 806682777949.

It is an arithmetic number, because the mean of its divisors is an integer number (806682777949).

Almost surely, 2^{1613365555897} is an apocalyptic number.

It is an amenable number.

1613365555897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613365555897 is an equidigital number, since it uses as much as digits as its factorization.

1613365555897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060000, while the sum is 64.

The spelling of 1613365555897 in words is "one trillion, six hundred thirteen billion, three hundred sixty-five million, five hundred fifty-five thousand, eight hundred ninety-seven".