216602168538 has 64 divisors (see below), whose sum is σ = 496536791040. Its totient is φ = 61705831872.

The previous prime is 216602168533. The next prime is 216602168539. The reversal of 216602168538 is 835861206612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (216602168533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22991593 + ... + 23001011.

It is an arithmetic number, because the mean of its divisors is an integer number (7758387360).

Almost surely, 2^216602168538 is an apocalyptic number.

216602168538 is an abundant number, since it is smaller than the sum of its proper divisors (279934622502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216602168538 is a wasteful number, since it uses less digits than its factorization.

216602168538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10971.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 216602168538 in words is "two hundred sixteen billion, six hundred two million, one hundred sixty-eight thousand, five hundred thirty-eight".