1252433440669 has 2 divisors, whose sum is σ = 1252433440670. Its totient is φ = 1252433440668.

The previous prime is 1252433440607. The next prime is 1252433440721. The reversal of 1252433440669 is 9660443342521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 793948717444 + 458484723225 = 891038^2 + 677115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252433440669 is a prime.

It is a super-2 number, since 2×1252433440669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252433440969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626216720334 + 626216720335.

It is an arithmetic number, because the mean of its divisors is an integer number (626216720335).

Almost surely, 2^{1252433440669} is an apocalyptic number.

It is an amenable number.

1252433440669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252433440669 is an equidigital number, since it uses as much as digits as its factorization.

1252433440669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 1252433440669 in words is "one trillion, two hundred fifty-two billion, four hundred thirty-three million, four hundred forty thousand, six hundred sixty-nine".