870156592866 has 640 divisors, whose sum is σ = 2465900236800. Its totient is φ = 226040855040.

The previous prime is 870156592831. The next prime is 870156592897. The reversal of 870156592866 is 668295651078.

870156592866 is a `hidden beast` number, since 8 + 7 + 0 + 1 + 565 + 9 + 2 + 8 + 66 = 666.

It is a super-2 number, since 2×870156592866² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 319 ways as a sum of consecutive naturals, for example, 1196913795 + ... + 1196914521.

It is an arithmetic number, because the mean of its divisors is an integer number (3852969120).

Almost surely, 2^870156592866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870156592866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232950118400).

870156592866 is an abundant number, since it is smaller than the sum of its proper divisors (1595743643934).

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

870156592866 is a wasteful number, since it uses less digits than its factorization.

870156592866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 870156592866 in words is "eight hundred seventy billion, one hundred fifty-six million, five hundred ninety-two thousand, eight hundred sixty-six".