216601573337687 has 2 divisors, whose sum is σ = 216601573337688. Its totient is φ = 216601573337686.

The previous prime is 216601573337663. The next prime is 216601573337701. The reversal of 216601573337687 is 786733375106612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216601573337687 - 2⁶ = 216601573337623 is a prime.

It is a super-2 number, since 2×216601573337687² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216601573337657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108300786668843 + 108300786668844.

It is an arithmetic number, because the mean of its divisors is an integer number (108300786668844).

Almost surely, 2^{216601573337687} is an apocalyptic number.

216601573337687 is a deficient number, since it is larger than the sum of its proper divisors (1).

216601573337687 is an equidigital number, since it uses as much as digits as its factorization.

216601573337687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160030080, while the sum is 65.

The spelling of 216601573337687 in words is "two hundred sixteen trillion, six hundred one billion, five hundred seventy-three million, three hundred thirty-seven thousand, six hundred eighty-seven".