16621518446442 has 96 divisors (see below), whose sum is σ = 45852464810880. Its totient is φ = 4232535189120.

The previous prime is 16621518446411. The next prime is 16621518446443. The reversal of 16621518446442 is 24464481512661.

16621518446442 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 15 + 184 + 4 + 6 + 442 = 666.

It is not an unprimeable number, because it can be changed into a prime (16621518446443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174908484 + ... + 175003487.

It is an arithmetic number, because the mean of its divisors is an integer number (477629841780).

Almost surely, 2^{16621518446442} is an apocalyptic number.

16621518446442 is an abundant number, since it is smaller than the sum of its proper divisors (29230946364438).

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

16621518446442 is a wasteful number, since it uses less digits than its factorization.

16621518446442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349912028 (or 349912025 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 54.

The spelling of 16621518446442 in words is "sixteen trillion, six hundred twenty-one billion, five hundred eighteen million, four hundred forty-six thousand, four hundred forty-two".