775357753321 has 2 divisors, whose sum is σ = 775357753322. Its totient is φ = 775357753320.

The previous prime is 775357753297. The next prime is 775357753349. The reversal of 775357753321 is 123357753577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717305669721 + 58052083600 = 846939^2 + 240940^2 .

It is a cyclic number.

It is not a de Polignac number, because 775357753321 - 2³¹ = 773210269673 is a prime.

It is not a weakly prime, because it can be changed into another prime (775357753381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387678876660 + 387678876661.

It is an arithmetic number, because the mean of its divisors is an integer number (387678876661).

Almost surely, 2^775357753321 is an apocalyptic number.

It is an amenable number.

775357753321 is a deficient number, since it is larger than the sum of its proper divisors (1).

775357753321 is an equidigital number, since it uses as much as digits as its factorization.

775357753321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16206750, while the sum is 55.

The spelling of 775357753321 in words is "seven hundred seventy-five billion, three hundred fifty-seven million, seven hundred fifty-three thousand, three hundred twenty-one".