856565614672 has 40 divisors (see below), whose sum is σ = 1683100935360. Its totient is φ = 422217922560.

The previous prime is 856565614651. The next prime is 856565614679. The reversal of 856565614672 is 276416565658.

It is a self number, because there is not a number n which added to its sum of digits gives 856565614672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856565614679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21813168 + ... + 21852400.

It is an arithmetic number, because the mean of its divisors is an integer number (42077523384).

Almost surely, 2^856565614672 is an apocalyptic number.

It is an amenable number.

856565614672 is a deficient number, since it is larger than the sum of its proper divisors (826535320688).

856565614672 is a wasteful number, since it uses less digits than its factorization.

856565614672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58531 (or 58525 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 61.

The spelling of 856565614672 in words is "eight hundred fifty-six billion, five hundred sixty-five million, six hundred fourteen thousand, six hundred seventy-two".