216205506552613 has 8 divisors (see below), whose sum is σ = 226326531106368. Its totient is φ = 206144547427104.

The previous prime is 216205506552559. The next prime is 216205506552649. The reversal of 216205506552613 is 316255605502612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216205506552613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216205506552653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15016349695 + ... + 15016364092.

It is an arithmetic number, because the mean of its divisors is an integer number (28290816388296).

Almost surely, 2^{216205506552613} is an apocalyptic number.

216205506552613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

216205506552613 is a deficient number, since it is larger than the sum of its proper divisors (10121024553755).

216205506552613 is a wasteful number, since it uses less digits than its factorization.

216205506552613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30032714123.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 216205506552613 in words is "two hundred sixteen trillion, two hundred five billion, five hundred six million, five hundred fifty-two thousand, six hundred thirteen".