216702157117 has 4 divisors (see below), whose sum is σ = 216851918176. Its totient is φ = 216552396060.

The previous prime is 216702157079. The next prime is 216702157127. The reversal of 216702157117 is 711751207612.

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 216702157117 - 2⁷ = 216702156989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216702157117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216702157127) 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, 74878359 + ... + 74881252.

It is an arithmetic number, because the mean of its divisors is an integer number (54212979544).

Almost surely, 2^216702157117 is an apocalyptic number.

It is an amenable number.

216702157117 is a deficient number, since it is larger than the sum of its proper divisors (149761059).

216702157117 is a wasteful number, since it uses less digits than its factorization.

216702157117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149761058.

The product of its (nonzero) digits is 41160, while the sum is 40.

The spelling of 216702157117 in words is "two hundred sixteen billion, seven hundred two million, one hundred fifty-seven thousand, one hundred seventeen".