1853207645 has 16 divisors (see below), whose sum is σ = 2252424240. Its totient is φ = 1463616000.

The previous prime is 1853207639. The next prime is 1853207647. The reversal of 1853207645 is 5467023581.

It can be written as a sum of positive squares in 8 ways, for example, as 431766841 + 1421440804 = 20779^2 + 37702^2 .

It is not a de Polignac number, because 1853207645 - 2⁶ = 1853207581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1853207647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 147095 + ... + 159195.

It is an arithmetic number, because the mean of its divisors is an integer number (140776515).

Almost surely, 2^1853207645 is an apocalyptic number.

It is an amenable number.

1853207645 is a deficient number, since it is larger than the sum of its proper divisors (399216595).

1853207645 is a wasteful number, since it uses less digits than its factorization.

1853207645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12496.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 1853207645 is about 43048.8983018149. The cubic root of 1853207645 is about 1228.3101135199.

The spelling of 1853207645 in words is "one billion, eight hundred fifty-three million, two hundred seven thousand, six hundred forty-five".