28507373717 has 4 divisors (see below), whose sum is σ = 28539513696. Its totient is φ = 28475233740.

The previous prime is 28507373689. The next prime is 28507373761. The reversal of 28507373717 is 71737370582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28507373717 - 2¹² = 28507369621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28507373417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16068659 + ... + 16070432.

It is an arithmetic number, because the mean of its divisors is an integer number (7134878424).

Almost surely, 2^28507373717 is an apocalyptic number.

It is an amenable number.

28507373717 is a deficient number, since it is larger than the sum of its proper divisors (32139979).

28507373717 is an equidigital number, since it uses as much as digits as its factorization.

28507373717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32139978.

The product of its (nonzero) digits is 1728720, while the sum is 50.

The spelling of 28507373717 in words is "twenty-eight billion, five hundred seven million, three hundred seventy-three thousand, seven hundred seventeen".