1801844556 has 48 divisors (see below), whose sum is σ = 4466246400. Its totient is φ = 563775552.

The previous prime is 1801844533. The next prime is 1801844557. The reversal of 1801844556 is 6554481081.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1801844557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11400 + ... + 61103.

It is an arithmetic number, because the mean of its divisors is an integer number (93046800).

Almost surely, 2^1801844556 is an apocalyptic number.

It is an amenable number.

1801844556 is an abundant number, since it is smaller than the sum of its proper divisors (2664401844).

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

1801844556 is a wasteful number, since it uses less digits than its factorization.

1801844556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72638 (or 72636 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 1801844556 is about 42448.1396058767. The cubic root of 1801844556 is about 1216.8557743792.

The spelling of 1801844556 in words is "one billion, eight hundred one million, eight hundred forty-four thousand, five hundred fifty-six".