1855153856 has 42 divisors (see below), whose sum is σ = 3707439372. Its totient is φ = 921041280.

The previous prime is 1855153831. The next prime is 1855153879. The reversal of 1855153856 is 6583515581.

It is a self number, because there is not a number n which added to its sum of digits gives 1855153856.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1699871 + ... + 1700961.

It is an arithmetic number, because the mean of its divisors is an integer number (88272366).

Almost surely, 2^1855153856 is an apocalyptic number.

1855153856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1855153856 is a deficient number, since it is larger than the sum of its proper divisors (1852285516).

1855153856 is an equidigital number, since it uses as much as digits as its factorization.

1855153856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429 (or 1256 counting only the distinct ones).

The product of its digits is 720000, while the sum is 47.

The square root of 1855153856 is about 43071.4970252950. The cubic root of 1855153856 is about 1228.7399474007.

The spelling of 1855153856 in words is "one billion, eight hundred fifty-five million, one hundred fifty-three thousand, eight hundred fifty-six".