215427870655 has 8 divisors (see below), whose sum is σ = 258524610912. Its totient is φ = 172334852448.

The previous prime is 215427870617. The next prime is 215427870689. The reversal of 215427870655 is 556078724512.

215427870655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215427870655 - 2⁷ = 215427870527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 801552 + ... + 1036021.

It is an arithmetic number, because the mean of its divisors is an integer number (32315576364).

Almost surely, 2^215427870655 is an apocalyptic number.

215427870655 is a deficient number, since it is larger than the sum of its proper divisors (43096740257).

215427870655 is a wasteful number, since it uses less digits than its factorization.

215427870655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861025.

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 215427870655 in words is "two hundred fifteen billion, four hundred twenty-seven million, eight hundred seventy thousand, six hundred fifty-five".