216717906157 has 16 divisors (see below), whose sum is σ = 226793877120. Its totient is φ = 206697268800.

The previous prime is 216717906127. The next prime is 216717906161. The reversal of 216717906157 is 751609717612.

It is a cyclic number.

It is not a de Polignac number, because 216717906157 - 2¹⁵ = 216717873389 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 (216717906127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11679307 + ... + 11697847.

It is an arithmetic number, because the mean of its divisors is an integer number (14174617320).

Almost surely, 2^216717906157 is an apocalyptic number.

It is an amenable number.

216717906157 is a deficient number, since it is larger than the sum of its proper divisors (10075970963).

216717906157 is a wasteful number, since it uses less digits than its factorization.

216717906157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20004.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The spelling of 216717906157 in words is "two hundred sixteen billion, seven hundred seventeen million, nine hundred six thousand, one hundred fifty-seven".