1655842849 has 4 divisors (see below), whose sum is σ = 1657817280. Its totient is φ = 1653868420.

The previous prime is 1655842831. The next prime is 1655842879. The reversal of 1655842849 is 9482485561.

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 1655842849 - 2¹⁷ = 1655711777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1655842796 and 1655842805.

It is not an unprimeable number, because it can be changed into a prime (1655842819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985957 + ... + 987634.

It is an arithmetic number, because the mean of its divisors is an integer number (414454320).

Almost surely, 2^1655842849 is an apocalyptic number.

It is an amenable number.

1655842849 is a deficient number, since it is larger than the sum of its proper divisors (1974431).

1655842849 is an equidigital number, since it uses as much as digits as its factorization.

1655842849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974430.

The product of its digits is 2764800, while the sum is 52.

The square root of 1655842849 is about 40692.0489653691. The cubic root of 1655842849 is about 1183.0589142850.

The spelling of 1655842849 in words is "one billion, six hundred fifty-five million, eight hundred forty-two thousand, eight hundred forty-nine".