2617621243673 has 2 divisors, whose sum is σ = 2617621243674. Its totient is φ = 2617621243672.

The previous prime is 2617621243661. The next prime is 2617621243681. The reversal of 2617621243673 is 3763421267162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2245091679769 + 372529563904 = 1498363^2 + 610352^2 .

It is a cyclic number.

It is not a de Polignac number, because 2617621243673 - 2⁶ = 2617621243609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2617621243273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1308810621836 + 1308810621837.

It is an arithmetic number, because the mean of its divisors is an integer number (1308810621837).

Almost surely, 2^{2617621243673} is an apocalyptic number.

It is an amenable number.

2617621243673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2617621243673 is an equidigital number, since it uses as much as digits as its factorization.

2617621243673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 50.

The spelling of 2617621243673 in words is "two trillion, six hundred seventeen billion, six hundred twenty-one million, two hundred forty-three thousand, six hundred seventy-three".