16556623623313 has 4 divisors (see below), whose sum is σ = 16557918032448. Its totient is φ = 16555329214180.

The previous prime is 16556623623247. The next prime is 16556623623317. The reversal of 16556623623313 is 31332632665561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16556623623313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556623623317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647185381 + ... + 647210962.

It is an arithmetic number, because the mean of its divisors is an integer number (4139479508112).

Almost surely, 2^{16556623623313} is an apocalyptic number.

It is an amenable number.

16556623623313 is a deficient number, since it is larger than the sum of its proper divisors (1294409135).

16556623623313 is a wasteful number, since it uses less digits than its factorization.

16556623623313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294409134.

The product of its digits is 10497600, while the sum is 52.

The spelling of 16556623623313 in words is "sixteen trillion, five hundred fifty-six billion, six hundred twenty-three million, six hundred twenty-three thousand, three hundred thirteen".