856142684927 has 4 divisors (see below), whose sum is σ = 856264771320. Its totient is φ = 856020598536.

The previous prime is 856142684923. The next prime is 856142684981. The reversal of 856142684927 is 729486241658.

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 856142684927 - 2² = 856142684923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 856142684927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856142684923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61032677 + ... + 61046702.

It is an arithmetic number, because the mean of its divisors is an integer number (214066192830).

Almost surely, 2^856142684927 is an apocalyptic number.

856142684927 is a deficient number, since it is larger than the sum of its proper divisors (122086393).

856142684927 is a wasteful number, since it uses less digits than its factorization.

856142684927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122086392.

The product of its digits is 46448640, while the sum is 62.

The spelling of 856142684927 in words is "eight hundred fifty-six billion, one hundred forty-two million, six hundred eighty-four thousand, nine hundred twenty-seven".