28581804677 has 4 divisors (see below), whose sum is σ = 28752953376. Its totient is φ = 28410655980.

The previous prime is 28581804613. The next prime is 28581804707. The reversal of 28581804677 is 77640818582.

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 28581804677 - 2⁶ = 28581804613 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 (28581804877) 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, 85574099 + ... + 85574432.

It is an arithmetic number, because the mean of its divisors is an integer number (7188238344).

Almost surely, 2^28581804677 is an apocalyptic number.

It is an amenable number.

28581804677 is a deficient number, since it is larger than the sum of its proper divisors (171148699).

28581804677 is a wasteful number, since it uses less digits than its factorization.

28581804677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171148698.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 28581804677 in words is "twenty-eight billion, five hundred eighty-one million, eight hundred four thousand, six hundred seventy-seven".