1855241169 has 4 divisors (see below), whose sum is σ = 2473654896. Its totient is φ = 1236827444.

The previous prime is 1855241123. The next prime is 1855241173. The reversal of 1855241169 is 9611425581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1855241169 - 2⁸ = 1855240913 is a prime.

It is a super-2 number, since 2×1855241169² = 6883839590304973122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1855241169.

It is not an unprimeable number, because it can be changed into a prime (1855741169) 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, 309206859 + ... + 309206864.

It is an arithmetic number, because the mean of its divisors is an integer number (618413724).

Almost surely, 2^1855241169 is an apocalyptic number.

It is an amenable number.

1855241169 is a deficient number, since it is larger than the sum of its proper divisors (618413727).

1855241169 is an equidigital number, since it uses as much as digits as its factorization.

1855241169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618413726.

The product of its digits is 86400, while the sum is 42.

The square root of 1855241169 is about 43072.5105955063. The cubic root of 1855241169 is about 1228.7592240207.

The spelling of 1855241169 in words is "one billion, eight hundred fifty-five million, two hundred forty-one thousand, one hundred sixty-nine".