28760617771 has 2 divisors, whose sum is σ = 28760617772. Its totient is φ = 28760617770.

The previous prime is 28760617759. The next prime is 28760617777. The reversal of 28760617771 is 17771606782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28760617771 is a prime.

It is a super-2 number, since 2×28760617771² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28760617777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380308885 + 14380308886.

It is an arithmetic number, because the mean of its divisors is an integer number (14380308886).

Almost surely, 2^28760617771 is an apocalyptic number.

28760617771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28760617771 is an equidigital number, since it uses as much as digits as its factorization.

28760617771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382976, while the sum is 52.

The spelling of 28760617771 in words is "twenty-eight billion, seven hundred sixty million, six hundred seventeen thousand, seven hundred seventy-one".