216615412445 has 16 divisors (see below), whose sum is σ = 275341187520. Its totient is φ = 163032178944.

The previous prime is 216615412421. The next prime is 216615412469. The reversal of 216615412445 is 544214516612.

It is an interprime number because it is at equal distance from previous prime (216615412421) and next prime (216615412469).

It is a cyclic number.

It is not a de Polignac number, because 216615412445 - 2¹⁰ = 216615411421 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309167 + ... + 727196.

It is an arithmetic number, because the mean of its divisors is an integer number (17208824220).

Almost surely, 2^216615412445 is an apocalyptic number.

It is an amenable number.

216615412445 is a deficient number, since it is larger than the sum of its proper divisors (58725775075).

216615412445 is a wasteful number, since it uses less digits than its factorization.

216615412445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038844.

The product of its digits is 230400, while the sum is 41.

The spelling of 216615412445 in words is "two hundred sixteen billion, six hundred fifteen million, four hundred twelve thousand, four hundred forty-five".