16579059121 has 4 divisors (see below), whose sum is σ = 17451641200. Its totient is φ = 15706477044.

The previous prime is 16579059113. The next prime is 16579059137. The reversal of 16579059121 is 12195097561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12195097561 = 109 ⋅111881629.

It is a cyclic number.

It is not a de Polignac number, because 16579059121 - 2³ = 16579059113 is a prime.

It is a super-2 number, since 2×16579059121² (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 (16579050121) 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, 436291011 + ... + 436291048.

It is an arithmetic number, because the mean of its divisors is an integer number (4362910300).

Almost surely, 2^16579059121 is an apocalyptic number.

It is an amenable number.

16579059121 is a deficient number, since it is larger than the sum of its proper divisors (872582079).

16579059121 is an equidigital number, since it uses as much as digits as its factorization.

16579059121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872582078.

The product of its (nonzero) digits is 170100, while the sum is 46.

The spelling of 16579059121 in words is "sixteen billion, five hundred seventy-nine million, fifty-nine thousand, one hundred twenty-one".