1564485804 has 144 divisors (see below), whose sum is σ = 4765802496. Its totient is φ = 423273600.

The previous prime is 1564485803. The next prime is 1564485833. The reversal of 1564485804 is 4085844651.

It is a happy number.

1564485804 is a `hidden beast` number, since 1 + 5 + 64 + 4 + 8 + 580 + 4 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1564485804.

It is not an unprimeable number, because it can be changed into a prime (1564485803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 365034 + ... + 369294.

Almost surely, 2^1564485804 is an apocalyptic number.

1564485804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1564485804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382901248).

1564485804 is an abundant number, since it is smaller than the sum of its proper divisors (3201316692).

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

1564485804 is a wasteful number, since it uses less digits than its factorization.

1564485804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356 (or 4351 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The square root of 1564485804 is about 39553.5814307630. The cubic root of 1564485804 is about 1160.8885888636. Note that the first 3 decimals are identical.

The spelling of 1564485804 in words is "one billion, five hundred sixty-four million, four hundred eighty-five thousand, eight hundred four".