216661050407955 has 8 divisors (see below), whose sum is σ = 346657680652752. Its totient is φ = 115552560217568.

The previous prime is 216661050407831. The next prime is 216661050408017. The reversal of 216661050407955 is 559704050166612.

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

It is a cyclic number.

It is not a de Polignac number, because 216661050407955 - 2¹³ = 216661050399763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216661050407895 and 216661050407904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7222035013584 + ... + 7222035013613.

It is an arithmetic number, because the mean of its divisors is an integer number (43332210081594).

Almost surely, 2^{216661050407955} is an apocalyptic number.

216661050407955 is a deficient number, since it is larger than the sum of its proper divisors (129996630244797).

216661050407955 is a wasteful number, since it uses less digits than its factorization.

216661050407955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14444070027205.

The product of its (nonzero) digits is 13608000, while the sum is 57.

The spelling of 216661050407955 in words is "two hundred sixteen trillion, six hundred sixty-one billion, fifty million, four hundred seven thousand, nine hundred fifty-five".