216216198396 has 48 divisors (see below), whose sum is σ = 611520564480. Its totient is φ = 65520059760.

The previous prime is 216216198383. The next prime is 216216198439. The reversal of 216216198396 is 693891612612.

216216198396 is a `hidden beast` number, since 2 + 1 + 6 + 2 + 161 + 98 + 396 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90998896 + ... + 91001271.

It is an arithmetic number, because the mean of its divisors is an integer number (12740011760).

Almost surely, 2^216216198396 is an apocalyptic number.

It is an amenable number.

216216198396 is an abundant number, since it is smaller than the sum of its proper divisors (395304366084).

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

216216198396 is a wasteful number, since it uses less digits than its factorization.

216216198396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182000191 (or 182000183 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The spelling of 216216198396 in words is "two hundred sixteen billion, two hundred sixteen million, one hundred ninety-eight thousand, three hundred ninety-six".