216430786593 has 32 divisors (see below), whose sum is σ = 375381323520. Its totient is φ = 120658273920.

The previous prime is 216430786573. The next prime is 216430786609. The reversal of 216430786593 is 395687034612.

216430786593 is a `hidden beast` number, since 2 + 1 + 6 + 43 + 0 + 7 + 8 + 6 + 593 = 666.

It is not a de Polignac number, because 216430786593 - 2⁹ = 216430786081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216430786573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13957330 + ... + 13972827.

It is an arithmetic number, because the mean of its divisors is an integer number (11730666360).

It is a 1-persistent number, because it is pandigital, but 2⋅216430786593 = 432861573186 is not.

Almost surely, 2^216430786593 is an apocalyptic number.

It is an amenable number.

216430786593 is a deficient number, since it is larger than the sum of its proper divisors (158950536927).

216430786593 is a wasteful number, since it uses less digits than its factorization.

216430786593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27930214 (or 27930208 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 216430786593 in words is "two hundred sixteen billion, four hundred thirty million, seven hundred eighty-six thousand, five hundred ninety-three".