1855149345 has 64 divisors (see below), whose sum is σ = 3861204480. Its totient is φ = 827366400.

The previous prime is 1855149319. The next prime is 1855149367. The reversal of 1855149345 is 5439415581.

It is a happy number.

1855149345 is a `hidden beast` number, since 1 + 8 + 5 + 514 + 93 + 45 = 666.

It is not a de Polignac number, because 1855149345 - 2⁵ = 1855149313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1855149345.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14805 + ... + 62685.

It is an arithmetic number, because the mean of its divisors is an integer number (60331320).

Almost surely, 2^1855149345 is an apocalyptic number.

1855149345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1855149345 is an abundant number, since it is smaller than the sum of its proper divisors (2006055135).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1855149345 is a wasteful number, since it uses less digits than its factorization.

1855149345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47943 (or 47937 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 1855149345 is about 43071.4446588456. Note that the first 3 decimals coincide. The cubic root of 1855149345 is about 1228.7389514635.

It can be divided in two parts, 18551 and 49345, that added together give a triangular number (67896 = T₃₆₈).

The spelling of 1855149345 in words is "one billion, eight hundred fifty-five million, one hundred forty-nine thousand, three hundred forty-five".