21616076215 has 8 divisors (see below), whose sum is σ = 27465132240. Its totient is φ = 16275633792.

The previous prime is 21616076189. The next prime is 21616076239. The reversal of 21616076215 is 51267061612.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21616076215 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127153305 + ... + 127153474.

It is an arithmetic number, because the mean of its divisors is an integer number (3433141530).

Almost surely, 2^21616076215 is an apocalyptic number.

21616076215 is a deficient number, since it is larger than the sum of its proper divisors (5849056025).

21616076215 is a wasteful number, since it uses less digits than its factorization.

21616076215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254306801.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 21616076215 in words is "twenty-one billion, six hundred sixteen million, seventy-six thousand, two hundred fifteen".