215889072156 has 72 divisors (see below), whose sum is σ = 579795390720. Its totient is φ = 67603648896.

The previous prime is 215889072151. The next prime is 215889072181. The reversal of 215889072156 is 651270988512.

215889072156 is a `hidden beast` number, since 2 + 1 + 588 + 9 + 0 + 7 + 2 + 1 + 56 = 666.

215889072156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215889072151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2755836 + ... + 2833091.

It is an arithmetic number, because the mean of its divisors is an integer number (8052713760).

Almost surely, 2^215889072156 is an apocalyptic number.

It is an amenable number.

215889072156 is an abundant number, since it is smaller than the sum of its proper divisors (363906318564).

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

215889072156 is a wasteful number, since it uses less digits than its factorization.

215889072156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589003 (or 5588998 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 215889072156 in words is "two hundred fifteen billion, eight hundred eighty-nine million, seventy-two thousand, one hundred fifty-six".