1564288961 has 4 divisors (see below), whose sum is σ = 1578908592. Its totient is φ = 1549669332.

The previous prime is 1564288951. The next prime is 1564288963. The reversal of 1564288961 is 1698824651.

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: 1698824651 = 37813 ⋅44927.

It is a cyclic number.

It is not a de Polignac number, because 1564288961 - 2⁶ = 1564288897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1564288963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7309655 + ... + 7309868.

It is an arithmetic number, because the mean of its divisors is an integer number (394727148).

Almost surely, 2^1564288961 is an apocalyptic number.

It is an amenable number.

1564288961 is a deficient number, since it is larger than the sum of its proper divisors (14619631).

1564288961 is a wasteful number, since it uses less digits than its factorization.

1564288961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14619630.

The product of its digits is 829440, while the sum is 50.

The square root of 1564288961 is about 39551.0930443142. The cubic root of 1564288961 is about 1160.8398993035.

The spelling of 1564288961 in words is "one billion, five hundred sixty-four million, two hundred eighty-eight thousand, nine hundred sixty-one".