1801663356 has 12 divisors (see below), whose sum is σ = 4203881192. Its totient is φ = 600554448.

The previous prime is 1801663319. The next prime is 1801663441. The reversal of 1801663356 is 6533661081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75069295 + ... + 75069318.

Almost surely, 2^1801663356 is an apocalyptic number.

It is an amenable number.

1801663356 is an abundant number, since it is smaller than the sum of its proper divisors (2402217836).

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

1801663356 is a wasteful number, since it uses less digits than its factorization.

1801663356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150138620 (or 150138618 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1801663356 is about 42446.0051830558. The cubic root of 1801663356 is about 1216.8149825404.

The spelling of 1801663356 in words is "one billion, eight hundred one million, six hundred sixty-three thousand, three hundred fifty-six".