856748434528 has 48 divisors (see below), whose sum is σ = 2011496336640. Its totient is φ = 351213641856.

The previous prime is 856748434501. The next prime is 856748434561. The reversal of 856748434528 is 825434847658.

856748434528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 856748434528.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83142018 + ... + 83152321.

It is an arithmetic number, because the mean of its divisors is an integer number (41906173680).

Almost surely, 2^856748434528 is an apocalyptic number.

It is an amenable number.

856748434528 is an abundant number, since it is smaller than the sum of its proper divisors (1154747902112).

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

856748434528 is a wasteful number, since it uses less digits than its factorization.

856748434528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166294379 (or 166294371 counting only the distinct ones).

The product of its digits is 206438400, while the sum is 64.

The spelling of 856748434528 in words is "eight hundred fifty-six billion, seven hundred forty-eight million, four hundred thirty-four thousand, five hundred twenty-eight".