856447419445131 has 16 divisors (see below), whose sum is σ = 1181360579196960. Its totient is φ = 551251396120320.

The previous prime is 856447419445109. The next prime is 856447419445207. The reversal of 856447419445131 is 131544914744658.

It is not a de Polignac number, because 856447419445131 - 2¹⁰ = 856447419444107 is a prime.

It is a super-2 number, since 2×856447419445131² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (856447419485131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222219060 + ... + 226040273.

It is an arithmetic number, because the mean of its divisors is an integer number (73835036199810).

Almost surely, 2^{856447419445131} is an apocalyptic number.

856447419445131 is a deficient number, since it is larger than the sum of its proper divisors (324913159751829).

856447419445131 is a wasteful number, since it uses less digits than its factorization.

856447419445131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448281326.

The product of its digits is 232243200, while the sum is 66.

The spelling of 856447419445131 in words is "eight hundred fifty-six trillion, four hundred forty-seven billion, four hundred nineteen million, four hundred forty-five thousand, one hundred thirty-one".