28331527577 has 4 divisors (see below), whose sum is σ = 28354694400. Its totient is φ = 28308360756.

The previous prime is 28331527571. The next prime is 28331527613. The reversal of 28331527577 is 77572513382.

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 28331527577 - 2¹² = 28331523481 is a prime.

It is a super-2 number, since 2×28331527577² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28331527571) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11581577 + ... + 11584022.

It is an arithmetic number, because the mean of its divisors is an integer number (7088673600).

Almost surely, 2^28331527577 is an apocalyptic number.

It is an amenable number.

28331527577 is a deficient number, since it is larger than the sum of its proper divisors (23166823).

28331527577 is a wasteful number, since it uses less digits than its factorization.

28331527577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23166822.

The product of its digits is 2469600, while the sum is 50.

The spelling of 28331527577 in words is "twenty-eight billion, three hundred thirty-one million, five hundred twenty-seven thousand, five hundred seventy-seven".