1320051564 has 108 divisors (see below), whose sum is σ = 3826060056. Its totient is φ = 382247424.

The previous prime is 1320051559. The next prime is 1320051583. The reversal of 1320051564 is 4651500231.

It is a super-2 number, since 2×1320051564² = 3485072263237692192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 97047 + ... + 109809.

It is an arithmetic number, because the mean of its divisors is an integer number (35426482).

Almost surely, 2^1320051564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320051564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1913030028).

1320051564 is an abundant number, since it is smaller than the sum of its proper divisors (2506008492).

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

1320051564 is a wasteful number, since it uses less digits than its factorization.

1320051564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12816 (or 12798 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1320051564 is about 36332.5138684347. The cubic root of 1320051564 is about 1096.9755940664.

Adding to 1320051564 its reverse (4651500231), we get a palindrome (5971551795).

The spelling of 1320051564 in words is "one billion, three hundred twenty million, fifty-one thousand, five hundred sixty-four".