28382793661 has 4 divisors (see below), whose sum is σ = 29616828192. Its totient is φ = 27148759132.

The previous prime is 28382793653. The next prime is 28382793697. The reversal of 28382793661 is 16639728382.

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 28382793661 - 2³ = 28382793653 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 (28382793601) 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, 617017231 + ... + 617017276.

It is an arithmetic number, because the mean of its divisors is an integer number (7404207048).

Almost surely, 2^28382793661 is an apocalyptic number.

It is an amenable number.

28382793661 is a deficient number, since it is larger than the sum of its proper divisors (1234034531).

28382793661 is a wasteful number, since it uses less digits than its factorization.

28382793661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234034530.

The product of its digits is 5225472, while the sum is 55.

The spelling of 28382793661 in words is "twenty-eight billion, three hundred eighty-two million, seven hundred ninety-three thousand, six hundred sixty-one".