856136255700 has 144 divisors (see below), whose sum is σ = 2706372406080. Its totient is φ = 207233664000.

The previous prime is 856136255671. The next prime is 856136255707. The reversal of 856136255700 is 7552631658.

It is a self number, because there is not a number n which added to its sum of digits gives 856136255700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856136255707) 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 47 ways as a sum of consecutive naturals, for example, 1985056 + ... + 2377544.

It is an arithmetic number, because the mean of its divisors is an integer number (18794252820).

Almost surely, 2^856136255700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856136255700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353186203040).

856136255700 is an abundant number, since it is smaller than the sum of its proper divisors (1850236150380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856136255700 is a wasteful number, since it uses less digits than its factorization.

856136255700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393178 (or 393171 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 856136255700 in words is "eight hundred fifty-six billion, one hundred thirty-six million, two hundred fifty-five thousand, seven hundred".