216530138663884 has 6 divisors (see below), whose sum is σ = 378927742661804. Its totient is φ = 108265069331940.

The previous prime is 216530138663869. The next prime is 216530138663899. The reversal of 216530138663884 is 488366831035612.

It is an interprime number because it is at equal distance from previous prime (216530138663869) and next prime (216530138663899).

It is a super-3 number, since 3×216530138663884³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27066267332982 + ... + 27066267332989.

Almost surely, 2^{216530138663884} is an apocalyptic number.

It is an amenable number.

216530138663884 is a deficient number, since it is larger than the sum of its proper divisors (162397603997920).

216530138663884 is a wasteful number, since it uses less digits than its factorization.

216530138663884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54132534665975 (or 54132534665973 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 64.

The spelling of 216530138663884 in words is "two hundred sixteen trillion, five hundred thirty billion, one hundred thirty-eight million, six hundred sixty-three thousand, eight hundred eighty-four".