28061775551 has 2 divisors, whose sum is σ = 28061775552. Its totient is φ = 28061775550.

The previous prime is 28061775529. The next prime is 28061775587. The reversal of 28061775551 is 15557716082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28061775551 - 2³⁰ = 26988033727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28061775496 and 28061775505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28061775251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14030887775 + 14030887776.

It is an arithmetic number, because the mean of its divisors is an integer number (14030887776).

Almost surely, 2^28061775551 is an apocalyptic number.

28061775551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28061775551 is an equidigital number, since it uses as much as digits as its factorization.

28061775551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588000, while the sum is 47.

The spelling of 28061775551 in words is "twenty-eight billion, sixty-one million, seven hundred seventy-five thousand, five hundred fifty-one".