1845645749 has 8 divisors (see below), whose sum is σ = 1958234688. Its totient is φ = 1733503680.

The previous prime is 1845645743. The next prime is 1845645751. The reversal of 1845645749 is 9475465481.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1845645749 - 2⁴ = 1845645733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1845645749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845645743) 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, 103187 + ... + 119744.

It is an arithmetic number, because the mean of its divisors is an integer number (244779336).

Almost surely, 2^1845645749 is an apocalyptic number.

It is an amenable number.

1845645749 is a deficient number, since it is larger than the sum of its proper divisors (112588939).

1845645749 is a wasteful number, since it uses less digits than its factorization.

1845645749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223435.

The product of its digits is 4838400, while the sum is 53.

The square root of 1845645749 is about 42960.9793766390. The cubic root of 1845645749 is about 1226.6371555384.

The spelling of 1845645749 in words is "one billion, eight hundred forty-five million, six hundred forty-five thousand, seven hundred forty-nine".