1801801028652 has 12 divisors (see below), whose sum is σ = 4204202400216. Its totient is φ = 600600342880.

The previous prime is 1801801028633. The next prime is 1801801028659. The reversal of 1801801028652 is 2568201081081.

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

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

It is not an unprimeable number, because it can be changed into a prime (1801801028659) 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, 75075042849 + ... + 75075042872.

It is an arithmetic number, because the mean of its divisors is an integer number (350350200018).

Almost surely, 2^{1801801028652} is an apocalyptic number.

1801801028652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1801801028652 is an abundant number, since it is smaller than the sum of its proper divisors (2402401371564).

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

1801801028652 is a wasteful number, since it uses less digits than its factorization.

1801801028652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150150085728 (or 150150085726 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 1801801028652 in words is "one trillion, eight hundred one billion, eight hundred one million, twenty-eight thousand, six hundred fifty-two".