12855803079001 has 9 divisors (see below), whose sum is σ = 12871724449599. Its totient is φ = 12839901390936.

The previous prime is 12855803078969. The next prime is 12855803079029. The reversal of 12855803079001 is 10097030855821.

The square root of 12855803079001 is 3585499.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12718959313225 + 136843765776 = 3566365^2 + 369924^2 .

It is not a de Polignac number, because 12855803079001 - 2⁵ = 12855803078969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12850803079001) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 3811383751 + ... + 3811387123.

It is an arithmetic number, because the mean of its divisors is an integer number (1430191605511).

Almost surely, 2^{12855803079001} is an apocalyptic number.

12855803079001 is the 3585499-th square number.

12855803079001 is the 1792750-th centered octagonal number.

It is an amenable number.

12855803079001 is a deficient number, since it is larger than the sum of its proper divisors (15921370598).

12855803079001 is an frugal number, since it uses more digits than its factorization.

12855803079001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8872 (or 4436 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 49.

Multiplying 12855803079001 by its sum of digits (49), we get a square (629934350871049 = 25098493²).

The spelling of 12855803079001 in words is "twelve trillion, eight hundred fifty-five billion, eight hundred three million, seventy-nine thousand, one".