856681677722 has 32 divisors (see below), whose sum is σ = 1465398263952. Its totient is φ = 372101796864.

The previous prime is 856681677701. The next prime is 856681677763. The reversal of 856681677722 is 227776186658.

856681677722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 143702404561 + 712979273161 = 379081^2 + 844381^2 .

It is a super-2 number, since 2×856681677722² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5605628 + ... + 5756424.

Almost surely, 2^856681677722 is an apocalyptic number.

856681677722 is a deficient number, since it is larger than the sum of its proper divisors (608716586230).

856681677722 is a wasteful number, since it uses less digits than its factorization.

856681677722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163682.

The product of its digits is 94832640, while the sum is 65.

The spelling of 856681677722 in words is "eight hundred fifty-six billion, six hundred eighty-one million, six hundred seventy-seven thousand, seven hundred twenty-two".