775514123053949 has 2 divisors, whose sum is σ = 775514123053950. Its totient is φ = 775514123053948.

The previous prime is 775514123053837. The next prime is 775514123054039. The reversal of 775514123053949 is 949350321415577.

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., 548108024653849 + 227406098400100 = 23411707^2 + 15079990^2 .

It is a cyclic number.

It is not a de Polignac number, because 775514123053949 - 2³⁶ = 775445403577213 is a prime.

It is a super-2 number, since 2×775514123053949² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775514123053349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387757061526974 + 387757061526975.

It is an arithmetic number, because the mean of its divisors is an integer number (387757061526975).

Almost surely, 2^{775514123053949} is an apocalyptic number.

It is an amenable number.

775514123053949 is a deficient number, since it is larger than the sum of its proper divisors (1).

775514123053949 is an equidigital number, since it uses as much as digits as its factorization.

775514123053949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884000, while the sum is 65.

The spelling of 775514123053949 in words is "seven hundred seventy-five trillion, five hundred fourteen billion, one hundred twenty-three million, fifty-three thousand, nine hundred forty-nine".