1564870945 has 8 divisors (see below), whose sum is σ = 2048558400. Its totient is φ = 1138087920.

The previous prime is 1564870889. The next prime is 1564870949. The reversal of 1564870945 is 5490784651.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1564870945 - 2¹⁷ = 1564739873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1564870949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14226045 + ... + 14226154.

It is an arithmetic number, because the mean of its divisors is an integer number (256069800).

Almost surely, 2^1564870945 is an apocalyptic number.

It is an amenable number.

1564870945 is a deficient number, since it is larger than the sum of its proper divisors (483687455).

1564870945 is a wasteful number, since it uses less digits than its factorization.

1564870945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28452215.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1564870945 is about 39558.4497294826. The cubic root of 1564870945 is about 1160.9838425473.

The spelling of 1564870945 in words is "one billion, five hundred sixty-four million, eight hundred seventy thousand, nine hundred forty-five".