16556021614403 has 2 divisors, whose sum is σ = 16556021614404. Its totient is φ = 16556021614402.

The previous prime is 16556021614393. The next prime is 16556021614541. The reversal of 16556021614403 is 30441612065561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16556021614403 - 2¹² = 16556021610307 is a prime.

It is not a weakly prime, because it can be changed into another prime (16556021614603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278010807201 + 8278010807202.

It is an arithmetic number, because the mean of its divisors is an integer number (8278010807202).

Almost surely, 2^{16556021614403} is an apocalyptic number.

16556021614403 is a deficient number, since it is larger than the sum of its proper divisors (1).

16556021614403 is an equidigital number, since it uses as much as digits as its factorization.

16556021614403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 44.

Adding to 16556021614403 its reverse (30441612065561), we get a palindrome (46997633679964).

The spelling of 16556021614403 in words is "sixteen trillion, five hundred fifty-six billion, twenty-one million, six hundred fourteen thousand, four hundred three".