28771235767 has 2 divisors, whose sum is σ = 28771235768. Its totient is φ = 28771235766.

The previous prime is 28771235723. The next prime is 28771235771. The reversal of 28771235767 is 76753217782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28771235767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28771235167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14385617883 + 14385617884.

It is an arithmetic number, because the mean of its divisors is an integer number (14385617884).

Almost surely, 2^28771235767 is an apocalyptic number.

28771235767 is a deficient number, since it is larger than the sum of its proper divisors (1).

28771235767 is an equidigital number, since it uses as much as digits as its factorization.

28771235767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6914880, while the sum is 55.

The spelling of 28771235767 in words is "twenty-eight billion, seven hundred seventy-one million, two hundred thirty-five thousand, seven hundred sixty-seven".