216611002513 has 4 divisors (see below), whose sum is σ = 216612039280. Its totient is φ = 216609965748.

The previous prime is 216611002507. The next prime is 216611002529. The reversal of 216611002513 is 315200116612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216611002513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216611002313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83223 + ... + 663436.

It is an arithmetic number, because the mean of its divisors is an integer number (54153009820).

Almost surely, 2^216611002513 is an apocalyptic number.

It is an amenable number.

216611002513 is a deficient number, since it is larger than the sum of its proper divisors (1036767).

216611002513 is an equidigital number, since it uses as much as digits as its factorization.

216611002513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036766.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 216611002513 in words is "two hundred sixteen billion, six hundred eleven million, two thousand, five hundred thirteen".