16034728561 has 4 divisors (see below), whose sum is σ = 16062045552. Its totient is φ = 16007411572.

The previous prime is 16034728519. The next prime is 16034728607. The reversal of 16034728561 is 16582743061.

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 16034728561 - 2⁷ = 16034728433 is a prime.

It is a super-2 number, since 2×16034728561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16034728511) 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, 13657615 + ... + 13658788.

It is an arithmetic number, because the mean of its divisors is an integer number (4015511388).

Almost surely, 2^16034728561 is an apocalyptic number.

It is an amenable number.

16034728561 is a deficient number, since it is larger than the sum of its proper divisors (27316991).

16034728561 is an equidigital number, since it uses as much as digits as its factorization.

16034728561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27316990.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 16034728561 in words is "sixteen billion, thirty-four million, seven hundred twenty-eight thousand, five hundred sixty-one".