1855147489 has 8 divisors (see below), whose sum is σ = 2016524160. Its totient is φ = 1696438416.

The previous prime is 1855147447. The next prime is 1855147507. The reversal of 1855147489 is 9847415581.

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 1855147489 - 2²⁵ = 1821593057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1855147439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665449 + ... + 668230.

It is an arithmetic number, because the mean of its divisors is an integer number (252065520).

Almost surely, 2^1855147489 is an apocalyptic number.

It is an amenable number.

1855147489 is a deficient number, since it is larger than the sum of its proper divisors (161376671).

1855147489 is a wasteful number, since it uses less digits than its factorization.

1855147489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333799.

The product of its digits is 1612800, while the sum is 52.

The square root of 1855147489 is about 43071.4231132430. The cubic root of 1855147489 is about 1228.7385416959.

The spelling of 1855147489 in words is "one billion, eight hundred fifty-five million, one hundred forty-seven thousand, four hundred eighty-nine".