216621464126612 has 48 divisors (see below), whose sum is σ = 398263577241600. Its totient is φ = 102897861710688.

The previous prime is 216621464126611. The next prime is 216621464126629.

216621464126612 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216621464126611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200648 + ... + 20815455.

It is an arithmetic number, because the mean of its divisors is an integer number (8297157859200).

Almost surely, 2^{216621464126612} is an apocalyptic number.

It is an amenable number.

216621464126612 is a deficient number, since it is larger than the sum of its proper divisors (181642113114988).

216621464126612 is a wasteful number, since it uses less digits than its factorization.

216621464126612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21016892 (or 21016890 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 50.

The spelling of 216621464126612 in words is "two hundred sixteen trillion, six hundred twenty-one billion, four hundred sixty-four million, one hundred twenty-six thousand, six hundred twelve".