28485063517 has 4 divisors (see below), whose sum is σ = 28493472060. Its totient is φ = 28476654976.

The previous prime is 28485063499. The next prime is 28485063521. The reversal of 28485063517 is 71536058482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28044861156 + 440202361 = 167466^2 + 20981^2 .

It is a cyclic number.

It is not a de Polignac number, because 28485063517 - 2⁷ = 28485063389 is a prime.

It is a super-2 number, since 2×28485063517² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485063557) 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, 4199188 + ... + 4205965.

It is an arithmetic number, because the mean of its divisors is an integer number (7123368015).

Almost surely, 2^28485063517 is an apocalyptic number.

It is an amenable number.

28485063517 is a deficient number, since it is larger than the sum of its proper divisors (8408543).

28485063517 is an equidigital number, since it uses as much as digits as its factorization.

28485063517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408542.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 28485063517 in words is "twenty-eight billion, four hundred eighty-five million, sixty-three thousand, five hundred seventeen".