2064809556 has 30 divisors (see below), whose sum is σ = 5397820890. Its totient is φ = 688269744.

The previous prime is 2064809519. The next prime is 2064809573. The reversal of 2064809556 is 6559084602.

It can be written as a sum of positive squares in only one way, i.e., 1925805456 + 139004100 = 43884^2 + 11790^2 .

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 3186111 + ... + 3186758.

It is an arithmetic number, because the mean of its divisors is an integer number (179927363).

Almost surely, 2^2064809556 is an apocalyptic number.

It is an amenable number.

2064809556 is an abundant number, since it is smaller than the sum of its proper divisors (3333011334).

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

2064809556 is a wasteful number, since it uses less digits than its factorization.

2064809556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372885 (or 6372874 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 2064809556 is about 45440.1755718439. The cubic root of 2064809556 is about 1273.3857938847.

The spelling of 2064809556 in words is "two billion, sixty-four million, eight hundred nine thousand, five hundred fifty-six".