774917164009 has 2 divisors, whose sum is σ = 774917164010. Its totient is φ = 774917164008.

The previous prime is 774917163973. The next prime is 774917164019. The reversal of 774917164009 is 900461719477.

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., 748908506025 + 26008657984 = 865395^2 + 161272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774917164009 is a prime.

It is a super-2 number, since 2×774917164009² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (774917164019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387458582004 + 387458582005.

It is an arithmetic number, because the mean of its divisors is an integer number (387458582005).

Almost surely, 2^774917164009 is an apocalyptic number.

It is an amenable number.

774917164009 is a deficient number, since it is larger than the sum of its proper divisors (1).

774917164009 is an equidigital number, since it uses as much as digits as its factorization.

774917164009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The spelling of 774917164009 in words is "seven hundred seventy-four billion, nine hundred seventeen million, one hundred sixty-four thousand, nine".