216061660617 has 16 divisors (see below), whose sum is σ = 322765332672. Its totient is φ = 127407366720.

The previous prime is 216061660603. The next prime is 216061660649. The reversal of 216061660617 is 716066160612.

It is a happy number.

216061660617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216061660617 - 2⁴ = 216061660601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216061660817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88476118 + ... + 88478559.

It is an arithmetic number, because the mean of its divisors is an integer number (20172833292).

Almost surely, 2^216061660617 is an apocalyptic number.

It is an amenable number.

216061660617 is a deficient number, since it is larger than the sum of its proper divisors (106703672055).

216061660617 is a wasteful number, since it uses less digits than its factorization.

216061660617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176954728.

The product of its (nonzero) digits is 108864, while the sum is 42.

It can be divided in two parts, 216061 and 660617, that added together give a palindrome (876678).

The spelling of 216061660617 in words is "two hundred sixteen billion, sixty-one million, six hundred sixty thousand, six hundred seventeen".