1855159449 has 128 divisors (see below), whose sum is σ = 3216998400. Its totient is φ = 934053120.

The previous prime is 1855159447. The next prime is 1855159463. The reversal of 1855159449 is 9449515581.

It is not a de Polignac number, because 1855159449 - 2¹ = 1855159447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1855159447) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23482992 + ... + 23483070.

It is an arithmetic number, because the mean of its divisors is an integer number (25132800).

Almost surely, 2^1855159449 is an apocalyptic number.

1855159449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1855159449 is a deficient number, since it is larger than the sum of its proper divisors (1361838951).

1855159449 is a wasteful number, since it uses less digits than its factorization.

1855159449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its digits is 1296000, while the sum is 51.

The square root of 1855159449 is about 43071.5619521744. The cubic root of 1855159449 is about 1228.7411822193.

The spelling of 1855159449 in words is "one billion, eight hundred fifty-five million, one hundred fifty-nine thousand, four hundred forty-nine".