16572427561 has 8 divisors (see below), whose sum is σ = 16600996160. Its totient is φ = 16543881072.

The previous prime is 16572427559. The next prime is 16572427579.

16572427561 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 16572427561 - 2¹ = 16572427559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16572427511) 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, 2184571 + ... + 2192143.

It is an arithmetic number, because the mean of its divisors is an integer number (2075124520).

Almost surely, 2^16572427561 is an apocalyptic number.

It is an amenable number.

16572427561 is a deficient number, since it is larger than the sum of its proper divisors (28568599).

16572427561 is an equidigital number, since it uses as much as digits as its factorization.

16572427561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055.

The product of its digits is 705600, while the sum is 46.

The spelling of 16572427561 in words is "sixteen billion, five hundred seventy-two million, four hundred twenty-seven thousand, five hundred sixty-one".