1211645336216 has 16 divisors (see below), whose sum is σ = 2596382863440. Its totient is φ = 519276572640.

The previous prime is 1211645336203. The next prime is 1211645336311. The reversal of 1211645336216 is 6126335461121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10818261875 + ... + 10818261986.

It is an arithmetic number, because the mean of its divisors is an integer number (162273928965).

Almost surely, 2^{1211645336216} is an apocalyptic number.

It is an amenable number.

1211645336216 is an abundant number, since it is smaller than the sum of its proper divisors (1384737527224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211645336216 is a wasteful number, since it uses less digits than its factorization.

1211645336216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21636523874 (or 21636523870 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The spelling of 1211645336216 in words is "one trillion, two hundred eleven billion, six hundred forty-five million, three hundred thirty-six thousand, two hundred sixteen".