1845120500 has 108 divisors (see below), whose sum is σ = 4318948452. Its totient is φ = 688486400.

The previous prime is 1845120493. The next prime is 1845120539. The reversal of 1845120500 is 50215481.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 18 ways, for example, as 1787936656 + 57183844 = 42284^2 + 7562^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1845120500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16328444 + ... + 16328556.

Almost surely, 2^1845120500 is an apocalyptic number.

1845120500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1845120500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2159474226).

1845120500 is an abundant number, since it is smaller than the sum of its proper divisors (2473827952).

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

1845120500 is a wasteful number, since it uses less digits than its factorization.

1845120500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 1845120500 is about 42954.8658477710. The cubic root of 1845120500 is about 1226.5207823452.

Adding to 1845120500 its reverse (50215481), we get a palindrome (1895335981).

The spelling of 1845120500 in words is "one billion, eight hundred forty-five million, one hundred twenty thousand, five hundred".