1564542066 has 16 divisors (see below), whose sum is σ = 3130625664. Its totient is φ = 521257104.

The previous prime is 1564542053. The next prime is 1564542071. The reversal of 1564542066 is 6602454651.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50821 + ... + 75576.

It is an arithmetic number, because the mean of its divisors is an integer number (195664104).

Almost surely, 2^1564542066 is an apocalyptic number.

1564542066 is an abundant number, since it is smaller than the sum of its proper divisors (1566083598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1564542066 is a wasteful number, since it uses less digits than its factorization.

1564542066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128465.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 1564542066 is about 39554.2926368302. The cubic root of 1564542066 is about 1160.9025046458.

The spelling of 1564542066 in words is "one billion, five hundred sixty-four million, five hundred forty-two thousand, sixty-six".