67738491760813 has 2 divisors, whose sum is σ = 67738491760814. Its totient is φ = 67738491760812.

The previous prime is 67738491760757. The next prime is 67738491760843. The reversal of 67738491760813 is 31806719483776.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38106385803369 + 29632105957444 = 6173037^2 + 5443538^2 .

It is a cyclic number.

It is not a de Polignac number, because 67738491760813 - 2²⁹ = 67737954889901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67738491760843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33869245880406 + 33869245880407.

It is an arithmetic number, because the mean of its divisors is an integer number (33869245880407).

Almost surely, 2^{67738491760813} is an apocalyptic number.

It is an amenable number.

67738491760813 is a deficient number, since it is larger than the sum of its proper divisors (1).

67738491760813 is an equidigital number, since it uses as much as digits as its factorization.

67738491760813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256048128, while the sum is 70.

The spelling of 67738491760813 in words is "sixty-seven trillion, seven hundred thirty-eight billion, four hundred ninety-one million, seven hundred sixty thousand, eight hundred thirteen".