856826906530 has 128 divisors (see below), whose sum is σ = 1850908962816. Its totient is φ = 279389260800.

The previous prime is 856826906491. The next prime is 856826906531. The reversal of 856826906530 is 35609628658.

It is not an unprimeable number, because it can be changed into a prime (856826906531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 213510804 + ... + 213514816.

It is an arithmetic number, because the mean of its divisors is an integer number (14460226272).

Almost surely, 2^856826906530 is an apocalyptic number.

856826906530 is an abundant number, since it is smaller than the sum of its proper divisors (994082056286).

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

856826906530 is a wasteful number, since it uses less digits than its factorization.

856826906530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 856826906530 in words is "eight hundred fifty-six billion, eight hundred twenty-six million, nine hundred six thousand, five hundred thirty".