216671516601 has 8 divisors (see below), whose sum is σ = 289033657440. Its totient is φ = 144378526752.

The previous prime is 216671516599. The next prime is 216671516681. The reversal of 216671516601 is 106615176612.

It is a happy number.

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

It is not a de Polignac number, because 216671516601 - 2¹ = 216671516599 is a prime.

It is a super-2 number, since 2×216671516601² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216671516681) 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, 17280435 + ... + 17292968.

It is an arithmetic number, because the mean of its divisors is an integer number (36129207180).

Almost surely, 2^216671516601 is an apocalyptic number.

It is an amenable number.

216671516601 is a deficient number, since it is larger than the sum of its proper divisors (72362140839).

216671516601 is a wasteful number, since it uses less digits than its factorization.

216671516601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34575495.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 216671516601 in words is "two hundred sixteen billion, six hundred seventy-one million, five hundred sixteen thousand, six hundred one".