1564216645 has 16 divisors (see below), whose sum is σ = 1942974720. Its totient is φ = 1207483200.

The previous prime is 1564216627. The next prime is 1564216649. The reversal of 1564216645 is 5466124651.

It is not a de Polignac number, because 1564216645 - 2¹⁷ = 1564085573 is a prime.

It is a super-3 number, since 3×1564216645³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1564216598 and 1564216607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564216649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428980 + ... + 432610.

It is an arithmetic number, because the mean of its divisors is an integer number (121435920).

Almost surely, 2^1564216645 is an apocalyptic number.

It is an amenable number.

1564216645 is a deficient number, since it is larger than the sum of its proper divisors (378758075).

1564216645 is a wasteful number, since it uses less digits than its factorization.

1564216645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6636.

The product of its digits is 172800, while the sum is 40.

The square root of 1564216645 is about 39550.1788238688. The cubic root of 1564216645 is about 1160.8220107518.

The spelling of 1564216645 in words is "one billion, five hundred sixty-four million, two hundred sixteen thousand, six hundred forty-five".