1564225617 has 32 divisors (see below), whose sum is σ = 2152438272. Its totient is φ = 1010110464.

The previous prime is 1564225613. The next prime is 1564225631. The reversal of 1564225617 is 7165224651.

It is not a de Polignac number, because 1564225617 - 2² = 1564225613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1564225613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5527158 + ... + 5527440.

It is an arithmetic number, because the mean of its divisors is an integer number (67263696).

Almost surely, 2^1564225617 is an apocalyptic number.

It is an amenable number.

1564225617 is a deficient number, since it is larger than the sum of its proper divisors (588212655).

1564225617 is a wasteful number, since it uses less digits than its factorization.

1564225617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its digits is 100800, while the sum is 39.

The square root of 1564225617 is about 39550.2922492363. The cubic root of 1564225617 is about 1160.8242301535.

The spelling of 1564225617 in words is "one billion, five hundred sixty-four million, two hundred twenty-five thousand, six hundred seventeen".