216611330552 has 8 divisors (see below), whose sum is σ = 406146244800. Its totient is φ = 108305665272.

The previous prime is 216611330543. The next prime is 216611330557. The reversal of 216611330552 is 255033116612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216611330557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13538208152 + ... + 13538208167.

It is an arithmetic number, because the mean of its divisors is an integer number (50768280600).

Almost surely, 2^216611330552 is an apocalyptic number.

It is an amenable number.

216611330552 is a deficient number, since it is larger than the sum of its proper divisors (189534914248).

216611330552 is a wasteful number, since it uses less digits than its factorization.

216611330552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27076416325 (or 27076416321 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 216611330552 in words is "two hundred sixteen billion, six hundred eleven million, three hundred thirty thousand, five hundred fifty-two".