215651024655 has 16 divisors (see below), whose sum is σ = 376409061504. Its totient is φ = 104558072480.

The previous prime is 215651024653. The next prime is 215651024747. The reversal of 215651024655 is 556420156512.

It is not a de Polignac number, because 215651024655 - 2¹ = 215651024653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215651024653) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 653487789 + ... + 653488118.

It is an arithmetic number, because the mean of its divisors is an integer number (23525566344).

Almost surely, 2^215651024655 is an apocalyptic number.

215651024655 is a deficient number, since it is larger than the sum of its proper divisors (160758036849).

215651024655 is a wasteful number, since it uses less digits than its factorization.

215651024655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306975926.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 215651024655 in words is "two hundred fifteen billion, six hundred fifty-one million, twenty-four thousand, six hundred fifty-five".