16211615242664 has 32 divisors (see below), whose sum is σ = 30516122687400. Its totient is φ = 8073984737280.

The previous prime is 16211615242657. The next prime is 16211615242813. The reversal of 16211615242664 is 46624251611261.

It can be written as a sum of positive squares in 4 ways, for example, as 15580845718564 + 630769524100 = 3947258^2 + 794210^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66371192 + ... + 66615000.

Almost surely, 2^{16211615242664} is an apocalyptic number.

It is an amenable number.

16211615242664 is a deficient number, since it is larger than the sum of its proper divisors (14304507444736).

16211615242664 is a wasteful number, since it uses less digits than its factorization.

16211615242664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276413 (or 276409 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The spelling of 16211615242664 in words is "sixteen trillion, two hundred eleven billion, six hundred fifteen million, two hundred forty-two thousand, six hundred sixty-four".