216526636 has 6 divisors (see below), whose sum is σ = 378921620. Its totient is φ = 108263316.

The previous prime is 216526633. The next prime is 216526649. The reversal of 216526636 is 636625612.

It is a junction number, because it is equal to n+sod(n) for n = 216526595 and 216526604.

It is not an unprimeable number, because it can be changed into a prime (216526631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27065826 + ... + 27065833.

Almost surely, 2^216526636 is an apocalyptic number.

It is an amenable number.

216526636 is a deficient number, since it is larger than the sum of its proper divisors (162394984).

216526636 is a wasteful number, since it uses less digits than its factorization.

216526636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54131663 (or 54131661 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 216526636 is about 14714.8440698500. The cubic root of 216526636 is about 600.4872301634.

The spelling of 216526636 in words is "two hundred sixteen million, five hundred twenty-six thousand, six hundred thirty-six".