16123030561 has 4 divisors (see below), whose sum is σ = 17588760624. Its totient is φ = 14657300500.

The previous prime is 16123030543. The next prime is 16123030579. The reversal of 16123030561 is 16503032161.

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 an interprime number because it is at equal distance from previous prime (16123030543) and next prime (16123030579).

It is a cyclic number.

It is not a de Polignac number, because 16123030561 - 2⁷ = 16123030433 is a prime.

It is a super-2 number, since 2×16123030561² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16123030661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732865015 + ... + 732865036.

It is an arithmetic number, because the mean of its divisors is an integer number (4397190156).

Almost surely, 2^16123030561 is an apocalyptic number.

16123030561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16123030561 is a deficient number, since it is larger than the sum of its proper divisors (1465730063).

16123030561 is a wasteful number, since it uses less digits than its factorization.

16123030561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465730062.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 16123030561 in words is "sixteen billion, one hundred twenty-three million, thirty thousand, five hundred sixty-one".