1345555569 has 4 divisors (see below), whose sum is σ = 1794074096. Its totient is φ = 897037044.

The previous prime is 1345555553. The next prime is 1345555597. The reversal of 1345555569 is 9655555431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1345555569 - 2⁴ = 1345555553 is a prime.

It is a super-2 number, since 2×1345555569² = 3621039578533827522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1345555069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224259259 + ... + 224259264.

It is an arithmetic number, because the mean of its divisors is an integer number (448518524).

Almost surely, 2^1345555569 is an apocalyptic number.

It is an amenable number.

1345555569 is a deficient number, since it is larger than the sum of its proper divisors (448518527).

1345555569 is an equidigital number, since it uses as much as digits as its factorization.

1345555569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448518526.

The product of its digits is 2025000, while the sum is 48.

The square root of 1345555569 is about 36681.8152358904. The cubic root of 1345555569 is about 1103.9952699795.

The spelling of 1345555569 in words is "one billion, three hundred forty-five million, five hundred fifty-five thousand, five hundred sixty-nine".