28553316161 has 16 divisors (see below), whose sum is σ = 31562427600. Its totient is φ = 25708935168.

The previous prime is 28553316151. The next prime is 28553316173. The reversal of 28553316161 is 16161335582.

It can be written as a sum of positive squares in 8 ways, for example, as 9185305600 + 19368010561 = 95840^2 + 139169^2 .

It is not a de Polignac number, because 28553316161 - 2³⁰ = 27479574337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28553316151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211940 + ... + 319413.

It is an arithmetic number, because the mean of its divisors is an integer number (1972651725).

Almost surely, 2^28553316161 is an apocalyptic number.

It is an amenable number.

28553316161 is a deficient number, since it is larger than the sum of its proper divisors (3009111439).

28553316161 is a wasteful number, since it uses less digits than its factorization.

28553316161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531508.

The product of its digits is 129600, while the sum is 41.

The spelling of 28553316161 in words is "twenty-eight billion, five hundred fifty-three million, three hundred sixteen thousand, one hundred sixty-one".