1855946065 has 4 divisors (see below), whose sum is σ = 2227135284. Its totient is φ = 1484756848.

The previous prime is 1855946047. The next prime is 1855946069. The reversal of 1855946065 is 5606495581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1221712209 + 634233856 = 34953^2 + 25184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855946065 - 2⁵ = 1855946033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1855946069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185594602 + ... + 185594611.

It is an arithmetic number, because the mean of its divisors is an integer number (556783821).

Almost surely, 2^1855946065 is an apocalyptic number.

It is an amenable number.

1855946065 is a deficient number, since it is larger than the sum of its proper divisors (371189219).

1855946065 is an equidigital number, since it uses as much as digits as its factorization.

1855946065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371189218.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The square root of 1855946065 is about 43080.6924851493. The cubic root of 1855946065 is about 1228.9148260349.

The spelling of 1855946065 in words is "one billion, eight hundred fifty-five million, nine hundred forty-six thousand, sixty-five".