2851261587847 has 4 divisors (see below), whose sum is σ = 2851268126256. Its totient is φ = 2851255049440.

The previous prime is 2851261587793. The next prime is 2851261587893. The reversal of 2851261587847 is 7487851621582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2851261587847 - 2²³ = 2851253199239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851261587247) 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 3 ways as a sum of consecutive naturals, for example, 2564443 + ... + 3504124.

It is an arithmetic number, because the mean of its divisors is an integer number (712817031564).

Almost surely, 2^{2851261587847} is an apocalyptic number.

2851261587847 is a deficient number, since it is larger than the sum of its proper divisors (6538409).

2851261587847 is an equidigital number, since it uses as much as digits as its factorization.

2851261587847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6538408.

The product of its digits is 60211200, while the sum is 64.

The spelling of 2851261587847 in words is "two trillion, eight hundred fifty-one billion, two hundred sixty-one million, five hundred eighty-seven thousand, eight hundred forty-seven".