16618995472571 has 8 divisors (see below), whose sum is σ = 17427572014080. Its totient is φ = 15826119446592.

The previous prime is 16618995472543. The next prime is 16618995472577. The reversal of 16618995472571 is 17527459981661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16618995472571 is a prime.

It is a super-2 number, since 2×16618995472571² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16618995472495 and 16618995472504.

It is not an unprimeable number, because it can be changed into a prime (16618995472577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3925126715 + ... + 3925130948.

It is an arithmetic number, because the mean of its divisors is an integer number (2178446501760).

Almost surely, 2^{16618995472571} is an apocalyptic number.

16618995472571 is a deficient number, since it is larger than the sum of its proper divisors (808576541509).

16618995472571 is an equidigital number, since it uses as much as digits as its factorization.

16618995472571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850257765.

The product of its digits is 228614400, while the sum is 71.

The spelling of 16618995472571 in words is "sixteen trillion, six hundred eighteen billion, nine hundred ninety-five million, four hundred seventy-two thousand, five hundred seventy-one".