1073681168639 has 2 divisors, whose sum is σ = 1073681168640. Its totient is φ = 1073681168638.

The previous prime is 1073681168611. The next prime is 1073681168647. The reversal of 1073681168639 is 9368611863701.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1073681168639 is a prime.

It is a super-2 number, since 2×1073681168639² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1073681168669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536840584319 + 536840584320.

It is an arithmetic number, because the mean of its divisors is an integer number (536840584320).

Almost surely, 2^{1073681168639} is an apocalyptic number.

1073681168639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1073681168639 is an equidigital number, since it uses as much as digits as its factorization.

1073681168639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 1073681168639 in words is "one trillion, seventy-three billion, six hundred eighty-one million, one hundred sixty-eight thousand, six hundred thirty-nine".