216193863601 has 4 divisors (see below), whose sum is σ = 216195889392. Its totient is φ = 216191837812.

The previous prime is 216193863533. The next prime is 216193863629. The reversal of 216193863601 is 106368391612.

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.

It is a cyclic number.

It is not a de Polignac number, because 216193863601 - 2⁹ = 216193863089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216193863661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843355 + ... + 1069408.

It is an arithmetic number, because the mean of its divisors is an integer number (54048972348).

Almost surely, 2^216193863601 is an apocalyptic number.

It is an amenable number.

216193863601 is a deficient number, since it is larger than the sum of its proper divisors (2025791).

216193863601 is a wasteful number, since it uses less digits than its factorization.

216193863601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025790.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 216193863601 in words is "two hundred sixteen billion, one hundred ninety-three million, eight hundred sixty-three thousand, six hundred one".