1809776056 has 16 divisors (see below), whose sum is σ = 3701814840. Its totient is φ = 822625440.

The previous prime is 1809776053. The next prime is 1809776057. The reversal of 1809776056 is 6506779081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809776051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10282731 + ... + 10282906.

Almost surely, 2^1809776056 is an apocalyptic number.

It is an amenable number.

1809776056 is an abundant number, since it is smaller than the sum of its proper divisors (1892038784).

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

1809776056 is a wasteful number, since it uses less digits than its factorization.

1809776056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20565654 (or 20565650 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 1809776056 is about 42541.4627863218. The cubic root of 1809776056 is about 1218.6386445145.

The spelling of 1809776056 in words is "one billion, eight hundred nine million, seven hundred seventy-six thousand, fifty-six".