856227909207 has 32 divisors (see below), whose sum is σ = 1272908611584. Its totient is φ = 507588530400.

The previous prime is 856227909203. The next prime is 856227909209. The reversal of 856227909207 is 702909722658.

It is a happy number.

It is not a de Polignac number, because 856227909207 - 2² = 856227909203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856227909203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1141183 + ... + 1736304.

It is an arithmetic number, because the mean of its divisors is an integer number (39778394112).

Almost surely, 2^856227909207 is an apocalyptic number.

856227909207 is a deficient number, since it is larger than the sum of its proper divisors (416680702377).

856227909207 is a wasteful number, since it uses less digits than its factorization.

856227909207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877699.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 856227909207 in words is "eight hundred fifty-six billion, two hundred twenty-seven million, nine hundred nine thousand, two hundred seven".