775657844131 has 2 divisors, whose sum is σ = 775657844132. Its totient is φ = 775657844130.

The previous prime is 775657844023. The next prime is 775657844141. The reversal of 775657844131 is 131448756577.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775657844131 is a prime.

It is a super-2 number, since 2×775657844131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (775657844141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387828922065 + 387828922066.

It is an arithmetic number, because the mean of its divisors is an integer number (387828922066).

Almost surely, 2^775657844131 is an apocalyptic number.

775657844131 is a deficient number, since it is larger than the sum of its proper divisors (1).

775657844131 is an equidigital number, since it uses as much as digits as its factorization.

775657844131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19756800, while the sum is 58.

The spelling of 775657844131 in words is "seven hundred seventy-five billion, six hundred fifty-seven million, eight hundred forty-four thousand, one hundred thirty-one".