216040407593 has 2 divisors, whose sum is σ = 216040407594. Its totient is φ = 216040407592.

The previous prime is 216040407587. The next prime is 216040407629. The reversal of 216040407593 is 395704040612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137709272464 + 78331135129 = 371092^2 + 279877^2 .

It is a cyclic number.

It is not a de Polignac number, because 216040407593 - 2²⁰ = 216039359017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216040407593.

It is not a weakly prime, because it can be changed into another prime (216040407523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108020203796 + 108020203797.

It is an arithmetic number, because the mean of its divisors is an integer number (108020203797).

Almost surely, 2^216040407593 is an apocalyptic number.

It is an amenable number.

216040407593 is a deficient number, since it is larger than the sum of its proper divisors (1).

216040407593 is an equidigital number, since it uses as much as digits as its factorization.

216040407593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 216040407593 in words is "two hundred sixteen billion, forty million, four hundred seven thousand, five hundred ninety-three".