856044135213 has 4 divisors (see below), whose sum is σ = 1141392180288. Its totient is φ = 570696090140.

The previous prime is 856044135203. The next prime is 856044135241. The reversal of 856044135213 is 312531440658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 856044135213 - 2²⁶ = 855977026349 is a prime.

It is a super-2 number, since 2×856044135213² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856044135203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142674022533 + ... + 142674022538.

It is an arithmetic number, because the mean of its divisors is an integer number (285348045072).

Almost surely, 2^856044135213 is an apocalyptic number.

It is an amenable number.

856044135213 is a deficient number, since it is larger than the sum of its proper divisors (285348045075).

856044135213 is a wasteful number, since it uses less digits than its factorization.

856044135213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285348045074.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 856044135213 in words is "eight hundred fifty-six billion, forty-four million, one hundred thirty-five thousand, two hundred thirteen".