1801545172 has 36 divisors (see below), whose sum is σ = 3680503680. Its totient is φ = 769338864.

The previous prime is 1801545169. The next prime is 1801545227. The reversal of 1801545172 is 2715451081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39229 + ... + 71707.

Almost surely, 2^1801545172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1801545172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840251840).

1801545172 is an abundant number, since it is smaller than the sum of its proper divisors (1878958508).

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

1801545172 is a wasteful number, since it uses less digits than its factorization.

1801545172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32780 (or 32771 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 1801545172 is about 42444.6129915211. The cubic root of 1801545172 is about 1216.7883754228.

The spelling of 1801545172 in words is "one billion, eight hundred one million, five hundred forty-five thousand, one hundred seventy-two".