216261636046 has 4 divisors (see below), whose sum is σ = 324392454072. Its totient is φ = 108130818022.

The previous prime is 216261636029. The next prime is 216261636077. The reversal of 216261636046 is 640636162612.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 216261635993 and 216261636011.

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, 54065409010 + ... + 54065409013.

It is an arithmetic number, because the mean of its divisors is an integer number (81098113518).

Almost surely, 2^216261636046 is an apocalyptic number.

216261636046 is a deficient number, since it is larger than the sum of its proper divisors (108130818026).

216261636046 is a wasteful number, since it uses less digits than its factorization.

216261636046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108130818025.

The product of its (nonzero) digits is 373248, while the sum is 43.

Adding to 216261636046 its reverse (640636162612), we get a palindrome (856897798658).

The spelling of 216261636046 in words is "two hundred sixteen billion, two hundred sixty-one million, six hundred thirty-six thousand, forty-six".