216635120352 has 96 divisors (see below), whose sum is σ = 722117088000. Its totient is φ = 61895746944.

The previous prime is 216635120293. The next prime is 216635120363. The reversal of 216635120352 is 253021536612.

216635120352 is a `hidden beast` number, since 2 + 1 + 6 + 635 + 12 + 0 + 3 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 17903602 + ... + 17915697.

It is an arithmetic number, because the mean of its divisors is an integer number (7522053000).

Almost surely, 2^216635120352 is an apocalyptic number.

It is an amenable number.

216635120352 is an abundant number, since it is smaller than the sum of its proper divisors (505481967648).

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

216635120352 is a wasteful number, since it uses less digits than its factorization.

216635120352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35819325 (or 35819311 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 216635120352 its reverse (253021536612), we get a palindrome (469656656964).

The spelling of 216635120352 in words is "two hundred sixteen billion, six hundred thirty-five million, one hundred twenty thousand, three hundred fifty-two".