1854489050985 has 32 divisors (see below), whose sum is σ = 2996379188352. Its totient is φ = 979376186880.

The previous prime is 1854489050963. The next prime is 1854489051001. The reversal of 1854489050985 is 5890509844581.

It is not a de Polignac number, because 1854489050985 - 2³³ = 1845899116393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 863644 + ... + 2110653.

It is an arithmetic number, because the mean of its divisors is an integer number (93636849636).

Almost surely, 2^{1854489050985} is an apocalyptic number.

1854489050985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1854489050985 is a deficient number, since it is larger than the sum of its proper divisors (1141890137367).

1854489050985 is a wasteful number, since it uses less digits than its factorization.

1854489050985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974713.

The product of its (nonzero) digits is 82944000, while the sum is 66.

The spelling of 1854489050985 in words is "one trillion, eight hundred fifty-four billion, four hundred eighty-nine million, fifty thousand, nine hundred eighty-five".