216720135158 has 4 divisors (see below), whose sum is σ = 325080202740. Its totient is φ = 108360067578.

The previous prime is 216720135067. The next prime is 216720135167. The reversal of 216720135158 is 851531027612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54180033788 + ... + 54180033791.

It is an arithmetic number, because the mean of its divisors is an integer number (81270050685).

Almost surely, 2^216720135158 is an apocalyptic number.

216720135158 is a deficient number, since it is larger than the sum of its proper divisors (108360067582).

216720135158 is a wasteful number, since it uses less digits than its factorization.

216720135158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108360067581.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 216720135158 in words is "two hundred sixteen billion, seven hundred twenty million, one hundred thirty-five thousand, one hundred fifty-eight".