856542568102 has 8 divisors (see below), whose sum is σ = 1383645686976. Its totient is φ = 395327339112.

The previous prime is 856542568081. The next prime is 856542568153. The reversal of 856542568102 is 201865245658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 856542568102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16471972438 + ... + 16471972489.

It is an arithmetic number, because the mean of its divisors is an integer number (172955710872).

Almost surely, 2^856542568102 is an apocalyptic number.

856542568102 is a deficient number, since it is larger than the sum of its proper divisors (527103118874).

856542568102 is a wasteful number, since it uses less digits than its factorization.

856542568102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32943944942.

The product of its (nonzero) digits is 4608000, while the sum is 52.

The spelling of 856542568102 in words is "eight hundred fifty-six billion, five hundred forty-two million, five hundred sixty-eight thousand, one hundred two".