216986344845730 has 32 divisors (see below), whose sum is σ = 393166092958848. Its totient is φ = 86218844928000.

The previous prime is 216986344845709. The next prime is 216986344845733. The reversal of 216986344845730 is 37548443689612.

It is a self number, because there is not a number n which added to its sum of digits gives 216986344845730.

It is not an unprimeable number, because it can be changed into a prime (216986344845733) 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, 155671185 + ... + 157058875.

It is an arithmetic number, because the mean of its divisors is an integer number (12286440404964).

It is a 1-persistent number, because it is pandigital, but 2⋅216986344845730 = 433972689691460 is not.

Almost surely, 2^{216986344845730} is an apocalyptic number.

216986344845730 is a deficient number, since it is larger than the sum of its proper divisors (176179748113118).

216986344845730 is a wasteful number, since it uses less digits than its factorization.

216986344845730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491402.

The product of its (nonzero) digits is 836075520, while the sum is 70.

The spelling of 216986344845730 in words is "two hundred sixteen trillion, nine hundred eighty-six billion, three hundred forty-four million, eight hundred forty-five thousand, seven hundred thirty".