856200661875 has 320 divisors, whose sum is σ = 1759026931200. Its totient is φ = 408863808000.

The previous prime is 856200661807. The next prime is 856200661891. The reversal of 856200661875 is 578166002658.

856200661875 is a `hidden beast` number, since 8 + 5 + 620 + 0 + 6 + 6 + 1 + 8 + 7 + 5 = 666.

It is not a de Polignac number, because 856200661875 - 2¹³ = 856200653683 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1074278977 + ... + 1074279773.

It is an arithmetic number, because the mean of its divisors is an integer number (5496959160).

Almost surely, 2^856200661875 is an apocalyptic number.

856200661875 is an abundant number, since it is smaller than the sum of its proper divisors (902826269325).

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

856200661875 is a wasteful number, since it uses less digits than its factorization.

856200661875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 856200661875 in words is "eight hundred fifty-six billion, two hundred million, six hundred sixty-one thousand, eight hundred seventy-five".