1245355353569 has 2 divisors, whose sum is σ = 1245355353570. Its totient is φ = 1245355353568.

The previous prime is 1245355353511. The next prime is 1245355353617. The reversal of 1245355353569 is 9653535535421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243867322944 + 1488030625 = 1115288^2 + 38575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245355353569 - 2¹² = 1245355349473 is a prime.

It is a super-2 number, since 2×1245355353569² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1245355356569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622677676784 + 622677676785.

It is an arithmetic number, because the mean of its divisors is an integer number (622677676785).

Almost surely, 2^{1245355353569} is an apocalyptic number.

It is an amenable number.

1245355353569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245355353569 is an equidigital number, since it uses as much as digits as its factorization.

1245355353569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36450000, while the sum is 56.

The spelling of 1245355353569 in words is "one trillion, two hundred forty-five billion, three hundred fifty-five million, three hundred fifty-three thousand, five hundred sixty-nine".