28557474117121 has 8 divisors (see below), whose sum is σ = 29075085826280. Its totient is φ = 28043278987392.

The previous prime is 28557474117059. The next prime is 28557474117131. The reversal of 28557474117121 is 12171147475582.

It can be written as a sum of positive squares in 4 ways, for example, as 6646986330625 + 21910487786496 = 2578175^2 + 4680864^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28557474117121 - 2⁷ = 28557474116993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28557474117131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854127990 + ... + 854161423.

It is an arithmetic number, because the mean of its divisors is an integer number (3634385728285).

Almost surely, 2^{28557474117121} is an apocalyptic number.

It is an amenable number.

28557474117121 is a deficient number, since it is larger than the sum of its proper divisors (517611709159).

28557474117121 is a wasteful number, since it uses less digits than its factorization.

28557474117121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708289715.

The product of its digits is 4390400, while the sum is 55.

The spelling of 28557474117121 in words is "twenty-eight trillion, five hundred fifty-seven billion, four hundred seventy-four million, one hundred seventeen thousand, one hundred twenty-one".