216546620685 has 8 divisors (see below), whose sum is σ = 346474593120. Its totient is φ = 115491531024.

The previous prime is 216546620683. The next prime is 216546620729. The reversal of 216546620685 is 586026645612.

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

It is not a de Polignac number, because 216546620685 - 2¹ = 216546620683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216546620683) 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, 7218220675 + ... + 7218220704.

It is an arithmetic number, because the mean of its divisors is an integer number (43309324140).

Almost surely, 2^216546620685 is an apocalyptic number.

It is an amenable number.

216546620685 is a deficient number, since it is larger than the sum of its proper divisors (129927972435).

216546620685 is a wasteful number, since it uses less digits than its factorization.

216546620685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436441387.

The product of its (nonzero) digits is 4147200, while the sum is 51.

The spelling of 216546620685 in words is "two hundred sixteen billion, five hundred forty-six million, six hundred twenty thousand, six hundred eighty-five".