28581707517 has 8 divisors (see below), whose sum is σ = 41573392800. Its totient is φ = 17322246960.

The previous prime is 28581707507. The next prime is 28581707519. The reversal of 28581707517 is 71570718582.

It is a happy number.

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

It is not a de Polignac number, because 28581707517 - 2¹⁹ = 28581183229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28581707517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28581707519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433056142 + ... + 433056207.

It is an arithmetic number, because the mean of its divisors is an integer number (5196674100).

Almost surely, 2^28581707517 is an apocalyptic number.

It is an amenable number.

28581707517 is a deficient number, since it is larger than the sum of its proper divisors (12991685283).

28581707517 is a wasteful number, since it uses less digits than its factorization.

28581707517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866112363.

The product of its (nonzero) digits is 1097600, while the sum is 51.

The spelling of 28581707517 in words is "twenty-eight billion, five hundred eighty-one million, seven hundred seven thousand, five hundred seventeen".