774206154974689 has 2 divisors, whose sum is σ = 774206154974690. Its totient is φ = 774206154974688.

The previous prime is 774206154974599. The next prime is 774206154974713. The reversal of 774206154974689 is 986479451602477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767229504392464 + 6976650582225 = 27698908^2 + 2641335^2 .

It is a cyclic number.

It is not a de Polignac number, because 774206154974689 - 2¹¹ = 774206154972641 is a prime.

It is a super-2 number, since 2×774206154974689² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (774206154974789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387103077487344 + 387103077487345.

It is an arithmetic number, because the mean of its divisors is an integer number (387103077487345).

Almost surely, 2^{774206154974689} is an apocalyptic number.

It is an amenable number.

774206154974689 is a deficient number, since it is larger than the sum of its proper divisors (1).

774206154974689 is an equidigital number, since it uses as much as digits as its factorization.

774206154974689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120962560, while the sum is 79.

The spelling of 774206154974689 in words is "seven hundred seventy-four trillion, two hundred six billion, one hundred fifty-four million, nine hundred seventy-four thousand, six hundred eighty-nine".