1855791825312 has 48 divisors (see below), whose sum is σ = 4872437533152. Its totient is φ = 618472323840.

The previous prime is 1855791825311. The next prime is 1855791825319. The reversal of 1855791825312 is 2135281975581.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1855791825311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474014 + ... + 2425757.

It is an arithmetic number, because the mean of its divisors is an integer number (101509115274).

Almost surely, 2^{1855791825312} is an apocalyptic number.

1855791825312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1855791825312 is an abundant number, since it is smaller than the sum of its proper divisors (3016645707840).

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

1855791825312 is a wasteful number, since it uses less digits than its factorization.

1855791825312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904741 (or 3904733 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 57.

The spelling of 1855791825312 in words is "one trillion, eight hundred fifty-five billion, seven hundred ninety-one million, eight hundred twenty-five thousand, three hundred twelve".