28558632506 has 4 divisors (see below), whose sum is σ = 42837948762. Its totient is φ = 14279316252.

The previous prime is 28558632491. The next prime is 28558632523. The reversal of 28558632506 is 60523685582.

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

It can be written as a sum of positive squares in only one way, i.e., 27288066481 + 1270566025 = 165191^2 + 35645^2 .

It is a super-2 number, since 2×28558632506² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7139658125 + ... + 7139658128.

Almost surely, 2^28558632506 is an apocalyptic number.

28558632506 is a deficient number, since it is larger than the sum of its proper divisors (14279316256).

28558632506 is a wasteful number, since it uses less digits than its factorization.

28558632506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14279316255.

The product of its (nonzero) digits is 3456000, while the sum is 50.

The spelling of 28558632506 in words is "twenty-eight billion, five hundred fifty-eight million, six hundred thirty-two thousand, five hundred six".