252785469569 has 2 divisors, whose sum is σ = 252785469570. Its totient is φ = 252785469568.

The previous prime is 252785469457. The next prime is 252785469583. The reversal of 252785469569 is 965964587252.

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., 252305290000 + 480179569 = 502300^2 + 21913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252785469569 is a prime.

It is a super-2 number, since 2×252785469569² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252785469499 and 252785469508.

It is not a weakly prime, because it can be changed into another prime (252785462569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126392734784 + 126392734785.

It is an arithmetic number, because the mean of its divisors is an integer number (126392734785).

Almost surely, 2^252785469569 is an apocalyptic number.

It is an amenable number.

252785469569 is a deficient number, since it is larger than the sum of its proper divisors (1).

252785469569 is an equidigital number, since it uses as much as digits as its factorization.

252785469569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592000, while the sum is 68.

The spelling of 252785469569 in words is "two hundred fifty-two billion, seven hundred eighty-five million, four hundred sixty-nine thousand, five hundred sixty-nine".