1617633768613 has 2 divisors, whose sum is σ = 1617633768614. Its totient is φ = 1617633768612.

The previous prime is 1617633768577. The next prime is 1617633768629. The reversal of 1617633768613 is 3168673367161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1242150372324 + 375483396289 = 1114518^2 + 612767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617633768613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617633768313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808816884306 + 808816884307.

It is an arithmetic number, because the mean of its divisors is an integer number (808816884307).

Almost surely, 2^{1617633768613} is an apocalyptic number.

It is an amenable number.

1617633768613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617633768613 is an equidigital number, since it uses as much as digits as its factorization.

1617633768613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 58.

The spelling of 1617633768613 in words is "one trillion, six hundred seventeen billion, six hundred thirty-three million, seven hundred sixty-eight thousand, six hundred thirteen".