28506768787377 has 12 divisors (see below), whose sum is σ = 41176526704144. Its totient is φ = 19004474263320.

The previous prime is 28506768787361. The next prime is 28506768787381. The reversal of 28506768787377 is 77378786760582.

28506768787377 is a `hidden beast` number, since 2 + 8 + 50 + 67 + 68 + 7 + 87 + 377 = 666.

It is not a de Polignac number, because 28506768787377 - 2⁴ = 28506768787361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28506768787296 and 28506768787305.

It is not an unprimeable number, because it can be changed into a prime (28506768787307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1969302 + ... + 7803312.

Almost surely, 2^{28506768787377} is an apocalyptic number.

It is an amenable number.

28506768787377 is a deficient number, since it is larger than the sum of its proper divisors (12669757916767).

28506768787377 is a wasteful number, since it uses less digits than its factorization.

28506768787377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6376940 (or 6376937 counting only the distinct ones).

The product of its (nonzero) digits is 9293598720, while the sum is 81.

The spelling of 28506768787377 in words is "twenty-eight trillion, five hundred six billion, seven hundred sixty-eight million, seven hundred eighty-seven thousand, three hundred seventy-seven".