764778237253 has 2 divisors, whose sum is σ = 764778237254. Its totient is φ = 764778237252.

The previous prime is 764778237229. The next prime is 764778237269. The reversal of 764778237253 is 352732877467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714163586724 + 50614650529 = 845082^2 + 224977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764778237253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 764778237191 and 764778237200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764778238253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382389118626 + 382389118627.

It is an arithmetic number, because the mean of its divisors is an integer number (382389118627).

Almost surely, 2^764778237253 is an apocalyptic number.

It is an amenable number.

764778237253 is a deficient number, since it is larger than the sum of its proper divisors (1).

764778237253 is an equidigital number, since it uses as much as digits as its factorization.

764778237253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82978560, while the sum is 61.

The spelling of 764778237253 in words is "seven hundred sixty-four billion, seven hundred seventy-eight million, two hundred thirty-seven thousand, two hundred fifty-three".