28765761767 has 2 divisors, whose sum is σ = 28765761768. Its totient is φ = 28765761766.

The previous prime is 28765761749. The next prime is 28765761781. The reversal of 28765761767 is 76716756782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28765761767 - 2⁸ = 28765761511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28765761737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14382880883 + 14382880884.

It is an arithmetic number, because the mean of its divisors is an integer number (14382880884).

Almost surely, 2^28765761767 is an apocalyptic number.

28765761767 is a deficient number, since it is larger than the sum of its proper divisors (1).

28765761767 is an equidigital number, since it uses as much as digits as its factorization.

28765761767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41489280, while the sum is 62.

The spelling of 28765761767 in words is "twenty-eight billion, seven hundred sixty-five million, seven hundred sixty-one thousand, seven hundred sixty-seven".