16005565061 has 4 divisors (see below), whose sum is σ = 16062122112. Its totient is φ = 15949008012.

The previous prime is 16005565033. The next prime is 16005565067. The reversal of 16005565061 is 16056550061.

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 not a de Polignac number, because 16005565061 - 2⁶ = 16005564997 is a prime.

It is a super-2 number, since 2×16005565061² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16005565067) 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, 28278101 + ... + 28278666.

It is an arithmetic number, because the mean of its divisors is an integer number (4015530528).

Almost surely, 2^16005565061 is an apocalyptic number.

It is an amenable number.

16005565061 is a deficient number, since it is larger than the sum of its proper divisors (56557051).

16005565061 is an equidigital number, since it uses as much as digits as its factorization.

16005565061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56557050.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 16005565061 in words is "sixteen billion, five million, five hundred sixty-five thousand, sixty-one".