1855491841 has 8 divisors (see below), whose sum is σ = 2123126720. Its totient is φ = 1588498128.

The previous prime is 1855491829. The next prime is 1855491863. The reversal of 1855491841 is 1481945581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1855491841 - 2⁷ = 1855491713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1855491791 and 1855491800.

It is not an unprimeable number, because it can be changed into a prime (1855491821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154071 + ... + 165676.

It is an arithmetic number, because the mean of its divisors is an integer number (265390840).

Almost surely, 2^1855491841 is an apocalyptic number.

It is an amenable number.

1855491841 is a deficient number, since it is larger than the sum of its proper divisors (267634879).

1855491841 is an equidigital number, since it uses as much as digits as its factorization.

1855491841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320583.

The product of its digits is 230400, while the sum is 46.

The square root of 1855491841 is about 43075.4203810015. The cubic root of 1855491841 is about 1228.8145630364.

The spelling of 1855491841 in words is "one billion, eight hundred fifty-five million, four hundred ninety-one thousand, eight hundred forty-one".