773247136861 has 2 divisors, whose sum is σ = 773247136862. Its totient is φ = 773247136860.

The previous prime is 773247136841. The next prime is 773247136873. The reversal of 773247136861 is 168631742377.

773247136861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750778925625 + 22468211236 = 866475^2 + 149894^2 .

It is a cyclic number.

It is not a de Polignac number, because 773247136861 - 2⁵ = 773247136829 is a prime.

It is a super-2 number, since 2×773247136861² (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 (773247136841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386623568430 + 386623568431.

It is an arithmetic number, because the mean of its divisors is an integer number (386623568431).

Almost surely, 2^773247136861 is an apocalyptic number.

It is an amenable number.

773247136861 is a deficient number, since it is larger than the sum of its proper divisors (1).

773247136861 is an equidigital number, since it uses as much as digits as its factorization.

773247136861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 55.

The spelling of 773247136861 in words is "seven hundred seventy-three billion, two hundred forty-seven million, one hundred thirty-six thousand, eight hundred sixty-one".