1801819745 has 8 divisors (see below), whose sum is σ = 2358745920. Its totient is φ = 1310414320.

The previous prime is 1801819741. The next prime is 1801819751. The reversal of 1801819745 is 5479181081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1801819745 - 2² = 1801819741 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1801819696 and 1801819705.

It is not an unprimeable number, because it can be changed into a prime (1801819741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16380125 + ... + 16380234.

It is an arithmetic number, because the mean of its divisors is an integer number (294843240).

Almost surely, 2^1801819745 is an apocalyptic number.

It is an amenable number.

1801819745 is a deficient number, since it is larger than the sum of its proper divisors (556926175).

1801819745 is a wasteful number, since it uses less digits than its factorization.

1801819745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32760375.

The product of its (nonzero) digits is 80640, while the sum is 44.

The square root of 1801819745 is about 42447.8473541356. The cubic root of 1801819745 is about 1216.8501890755.

The spelling of 1801819745 in words is "one billion, eight hundred one million, eight hundred nineteen thousand, seven hundred forty-five".