28777444477787 has 2 divisors, whose sum is σ = 28777444477788. Its totient is φ = 28777444477786.

The previous prime is 28777444477711. The next prime is 28777444477811. The reversal of 28777444477787 is 78777444477782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28777444477787 - 2²⁸ = 28777176042331 is a prime.

It is a super-2 number, since 2×28777444477787² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28777444473787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14388722238893 + 14388722238894.

It is an arithmetic number, because the mean of its divisors is an integer number (14388722238894).

Almost surely, 2^{28777444477787} is an apocalyptic number.

28777444477787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28777444477787 is an equidigital number, since it uses as much as digits as its factorization.

28777444477787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26985857024, while the sum is 83.

The spelling of 28777444477787 in words is "twenty-eight trillion, seven hundred seventy-seven billion, four hundred forty-four million, four hundred seventy-seven thousand, seven hundred eighty-seven".