216576995956 has 6 divisors (see below), whose sum is σ = 379009742930. Its totient is φ = 108288497976.

The previous prime is 216576995927. The next prime is 216576995963. The reversal of 216576995956 is 659599675612.

It can be written as a sum of positive squares in only one way, i.e., 205268800356 + 11308195600 = 453066^2 + 106340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27072124491 + ... + 27072124498.

Almost surely, 2^216576995956 is an apocalyptic number.

It is an amenable number.

216576995956 is a deficient number, since it is larger than the sum of its proper divisors (162432746974).

216576995956 is a wasteful number, since it uses less digits than its factorization.

216576995956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54144248993 (or 54144248991 counting only the distinct ones).

The product of its digits is 275562000, while the sum is 70.

The spelling of 216576995956 in words is "two hundred sixteen billion, five hundred seventy-six million, nine hundred ninety-five thousand, nine hundred fifty-six".