1851344045 has 8 divisors (see below), whose sum is σ = 2221944696. Its totient is φ = 1480854016.

The previous prime is 1851344029. The next prime is 1851344051. The reversal of 1851344045 is 5404431581.

It can be written as a sum of positive squares in 4 ways, for example, as 407192041 + 1444152004 = 20179^2 + 38002^2 .

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 1851344045 - 2⁴ = 1851344029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1851343996 and 1851344014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15209 + ... + 62721.

It is an arithmetic number, because the mean of its divisors is an integer number (277743087).

Almost surely, 2^1851344045 is an apocalyptic number.

It is an amenable number.

1851344045 is a deficient number, since it is larger than the sum of its proper divisors (370600651).

1851344045 is an equidigital number, since it uses as much as digits as its factorization.

1851344045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55311.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 1851344045 is about 43027.2477042165. The cubic root of 1851344045 is about 1227.8982426991.

The spelling of 1851344045 in words is "one billion, eight hundred fifty-one million, three hundred forty-four thousand, forty-five".