28563925977 has 12 divisors (see below), whose sum is σ = 42589940224. Its totient is φ = 18428339160.

The previous prime is 28563925969. The next prime is 28563925993. The reversal of 28563925977 is 77952936582.

28563925977 is a `hidden beast` number, since 2 + 8 + 5 + 6 + 39 + 2 + 597 + 7 = 666.

It is not a de Polignac number, because 28563925977 - 2³ = 28563925969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28563925477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51189553 + ... + 51190110.

Almost surely, 2^28563925977 is an apocalyptic number.

It is an amenable number.

28563925977 is a deficient number, since it is larger than the sum of its proper divisors (14026014247).

28563925977 is a wasteful number, since it uses less digits than its factorization.

28563925977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102379700 (or 102379697 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 28563925977 in words is "twenty-eight billion, five hundred sixty-three million, nine hundred twenty-five thousand, nine hundred seventy-seven".