1564241369 has 4 divisors (see below), whose sum is σ = 1614700800. Its totient is φ = 1513781940.

The previous prime is 1564241363. The next prime is 1564241423. The reversal of 1564241369 is 9631424651.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9631424651 = 46747 ⋅206033.

It is a cyclic number.

It is not a de Polignac number, because 1564241369 - 2²⁰ = 1563192793 is a prime.

It is a super-2 number, since 2×1564241369² = 4893702120981988322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1564241363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25229669 + ... + 25229730.

It is an arithmetic number, because the mean of its divisors is an integer number (403675200).

Almost surely, 2^1564241369 is an apocalyptic number.

It is an amenable number.

1564241369 is a deficient number, since it is larger than the sum of its proper divisors (50459431).

1564241369 is an equidigital number, since it uses as much as digits as its factorization.

1564241369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50459430.

The product of its digits is 155520, while the sum is 41.

The square root of 1564241369 is about 39550.4913875921. The cubic root of 1564241369 is about 1160.8281267017.

The spelling of 1564241369 in words is "one billion, five hundred sixty-four million, two hundred forty-one thousand, three hundred sixty-nine".