1801755642 has 64 divisors (see below), whose sum is σ = 3916560384. Its totient is φ = 550368000.

The previous prime is 1801755611. The next prime is 1801755649. The reversal of 1801755642 is 2465571081.

It is a self number, because there is not a number n which added to its sum of digits gives 1801755642.

It is not an unprimeable number, because it can be changed into a prime (1801755649) 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 31 ways as a sum of consecutive naturals, for example, 2398767 + ... + 2399517.

It is an arithmetic number, because the mean of its divisors is an integer number (61196256).

Almost surely, 2^1801755642 is an apocalyptic number.

1801755642 is an abundant number, since it is smaller than the sum of its proper divisors (2114804742).

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

1801755642 is a wasteful number, since it uses less digits than its factorization.

1801755642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 1801755642 is about 42447.0922679045. The cubic root of 1801755642 is about 1216.8357583547.

The spelling of 1801755642 in words is "one billion, eight hundred one million, seven hundred fifty-five thousand, six hundred forty-two".