216620941288 has 16 divisors (see below), whose sum is σ = 406276736580. Its totient is φ = 108280478208.

The previous prime is 216620941279. The next prime is 216620941289. The reversal of 216620941288 is 882149026612.

It can be written as a sum of positive squares in 2 ways, for example, as 184795094884 + 31825846404 = 429878^2 + 178398^2 .

It is not an unprimeable number, because it can be changed into a prime (216620941289) 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, 3718345 + ... + 3776152.

Almost surely, 2^216620941288 is an apocalyptic number.

It is an amenable number.

216620941288 is a deficient number, since it is larger than the sum of its proper divisors (189655795292).

216620941288 is a wasteful number, since it uses less digits than its factorization.

216620941288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498116 (or 7498112 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 216620941288 in words is "two hundred sixteen billion, six hundred twenty million, nine hundred forty-one thousand, two hundred eighty-eight".