1564450120 has 64 divisors (see below), whose sum is σ = 3795724800. Its totient is φ = 578373120.

The previous prime is 1564450117. The next prime is 1564450127. The reversal of 1564450120 is 210544651.

It is not an unprimeable number, because it can be changed into a prime (1564450127) 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, 6057 + ... + 56263.

It is an arithmetic number, because the mean of its divisors is an integer number (59308200).

Almost surely, 2^1564450120 is an apocalyptic number.

1564450120 is a gapful number since it is divisible by the number (10) 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 1564450120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1897862400).

1564450120 is an abundant number, since it is smaller than the sum of its proper divisors (2231274680).

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

1564450120 is a wasteful number, since it uses less digits than its factorization.

1564450120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50278 (or 50274 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1564450120 is about 39553.1303438805. The cubic root of 1564450120 is about 1160.8797626488.

Adding to 1564450120 its reverse (210544651), we get a palindrome (1774994771).

The spelling of 1564450120 in words is "one billion, five hundred sixty-four million, four hundred fifty thousand, one hundred twenty".