1845148945 has 4 divisors (see below), whose sum is σ = 2214178740. Its totient is φ = 1476119152.

The previous prime is 1845148939. The next prime is 1845148961. The reversal of 1845148945 is 5498415481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5498415481 = 13 ⋅422955037.

It can be written as a sum of positive squares in 2 ways, for example, as 189310081 + 1655838864 = 13759^2 + 40692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1845148945 - 2⁵ = 1845148913 is a prime.

It is a super-2 number, since 2×1845148945² = 6809149258469226050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184514890 + ... + 184514899.

It is an arithmetic number, because the mean of its divisors is an integer number (553544685).

Almost surely, 2^1845148945 is an apocalyptic number.

It is an amenable number.

1845148945 is a deficient number, since it is larger than the sum of its proper divisors (369029795).

1845148945 is an equidigital number, since it uses as much as digits as its factorization.

1845148945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369029794.

The product of its digits is 921600, while the sum is 49.

The square root of 1845148945 is about 42955.1969498453. The cubic root of 1845148945 is about 1226.5270851321.

The spelling of 1845148945 in words is "one billion, eight hundred forty-five million, one hundred forty-eight thousand, nine hundred forty-five".