775362816149 has 4 divisors (see below), whose sum is σ = 816171385440. Its totient is φ = 734554246860.

The previous prime is 775362816133. The next prime is 775362816167. The reversal of 775362816149 is 941618263577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941618263577 = 325901 ⋅2889277.

It is a cyclic number.

It is not a de Polignac number, because 775362816149 - 2⁴ = 775362816133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775362816199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20404284617 + ... + 20404284654.

It is an arithmetic number, because the mean of its divisors is an integer number (204042846360).

Almost surely, 2^775362816149 is an apocalyptic number.

It is an amenable number.

775362816149 is a deficient number, since it is larger than the sum of its proper divisors (40808569291).

775362816149 is a wasteful number, since it uses less digits than its factorization.

775362816149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40808569290.

The product of its digits is 15240960, while the sum is 59.

The spelling of 775362816149 in words is "seven hundred seventy-five billion, three hundred sixty-two million, eight hundred sixteen thousand, one hundred forty-nine".