1564171216 has 20 divisors (see below), whose sum is σ = 3128343424. Its totient is φ = 756856800.

The previous prime is 1564171183. The next prime is 1564171223. The reversal of 1564171216 is 6121714651.

1564171216 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576290 + ... + 1577281.

Almost surely, 2^1564171216 is an apocalyptic number.

1564171216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1564171216 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1564171216 is a wasteful number, since it uses less digits than its factorization.

1564171216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153610 (or 3153604 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 1564171216 is about 39549.6044986546. The cubic root of 1564171216 is about 1160.8107728597.

Adding to 1564171216 its reverse (6121714651), we get a palindrome (7685885867).

The spelling of 1564171216 in words is "one billion, five hundred sixty-four million, one hundred seventy-one thousand, two hundred sixteen".