28081455737 has 2 divisors, whose sum is σ = 28081455738. Its totient is φ = 28081455736.

The previous prime is 28081455733. The next prime is 28081455749. The reversal of 28081455737 is 73755418082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16330028521 + 11751427216 = 127789^2 + 108404^2 .

It is a cyclic number.

It is not a de Polignac number, because 28081455737 - 2² = 28081455733 is a prime.

It is not a weakly prime, because it can be changed into another prime (28081455733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040727868 + 14040727869.

It is an arithmetic number, because the mean of its divisors is an integer number (14040727869).

Almost surely, 2^28081455737 is an apocalyptic number.

It is an amenable number.

28081455737 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081455737 is an equidigital number, since it uses as much as digits as its factorization.

28081455737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 28081455737 in words is "twenty-eight billion, eighty-one million, four hundred fifty-five thousand, seven hundred thirty-seven".