17641440613 has 2 divisors, whose sum is σ = 17641440614. Its totient is φ = 17641440612.

The previous prime is 17641440589. The next prime is 17641440643. The reversal of 17641440613 is 31604414671.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10131831649 + 7509608964 = 100657^2 + 86658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17641440613 is a prime.

It is a super-2 number, since 2×17641440613² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17641440643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8820720306 + 8820720307.

It is an arithmetic number, because the mean of its divisors is an integer number (8820720307).

Almost surely, 2^17641440613 is an apocalyptic number.

It is an amenable number.

17641440613 is a deficient number, since it is larger than the sum of its proper divisors (1).

17641440613 is an equidigital number, since it uses as much as digits as its factorization.

17641440613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 17641440613 in words is "seventeen billion, six hundred forty-one million, four hundred forty thousand, six hundred thirteen".