216706180417756 has 12 divisors (see below), whose sum is σ = 379235984127840. Its totient is φ = 108353042095520.

The previous prime is 216706180417751. The next prime is 216706180417759. The reversal of 216706180417756 is 657714081607612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216706180417694 and 216706180417703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216706180417751) 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, 711025 + ... + 20830696.

It is an arithmetic number, because the mean of its divisors is an integer number (31602998677320).

Almost surely, 2^{216706180417756} is an apocalyptic number.

It is an amenable number.

216706180417756 is a deficient number, since it is larger than the sum of its proper divisors (162529803710084).

216706180417756 is a wasteful number, since it uses less digits than its factorization.

216706180417756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24056684 (or 24056682 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 216706180417756 in words is "two hundred sixteen trillion, seven hundred six billion, one hundred eighty million, four hundred seventeen thousand, seven hundred fifty-six".