28225163805697 has 8 divisors (see below), whose sum is σ = 28484625957480. Its totient is φ = 27965711030400.

The previous prime is 28225163805637. The next prime is 28225163805701. The reversal of 28225163805697 is 79650836152282.

It is a Cunningham number, because it is equal to 5312736²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 19672808643216 + 8552355162481 = 4435404^2 + 2924441^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28225163805697 is a prime.

It is a super-3 number, since 3×28225163805697³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28225163805637) 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, 3777093 + ... + 8409325.

It is an arithmetic number, because the mean of its divisors is an integer number (3560578244685).

Almost surely, 2^{28225163805697} is an apocalyptic number.

It is an amenable number.

28225163805697 is a deficient number, since it is larger than the sum of its proper divisors (259462151783).

28225163805697 is a wasteful number, since it uses less digits than its factorization.

28225163805697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688243.

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 28225163805697 in words is "twenty-eight trillion, two hundred twenty-five billion, one hundred sixty-three million, eight hundred five thousand, six hundred ninety-seven".