1801155445 has 16 divisors (see below), whose sum is σ = 2318077440. Its totient is φ = 1339326144.

The previous prime is 1801155401. The next prime is 1801155451. The reversal of 1801155445 is 5445511081.

It is a cyclic number.

It is not a de Polignac number, because 1801155445 - 2⁹ = 1801154933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1801155445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173829 + ... + 183898.

It is an arithmetic number, because the mean of its divisors is an integer number (144879840).

Almost surely, 2^1801155445 is an apocalyptic number.

It is an amenable number.

1801155445 is a deficient number, since it is larger than the sum of its proper divisors (516921995).

1801155445 is a wasteful number, since it uses less digits than its factorization.

1801155445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357804.

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 1801155445 is about 42440.0217365637. The cubic root of 1801155445 is about 1216.7006267704.

It can be divided in two parts, 180 and 1155445, that added together give a square (1155625 = 1075²).

The spelling of 1801155445 in words is "one billion, eight hundred one million, one hundred fifty-five thousand, four hundred forty-five".