27800746429 has 2 divisors, whose sum is σ = 27800746430. Its totient is φ = 27800746428.

The previous prime is 27800746423. The next prime is 27800746451. The reversal of 27800746429 is 92464700872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15656265625 + 12144480804 = 125125^2 + 110202^2 .

It is a cyclic number.

It is not a de Polignac number, because 27800746429 - 2¹⁷ = 27800615357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27800746423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900373214 + 13900373215.

It is an arithmetic number, because the mean of its divisors is an integer number (13900373215).

Almost surely, 2^27800746429 is an apocalyptic number.

It is an amenable number.

27800746429 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800746429 is an equidigital number, since it uses as much as digits as its factorization.

27800746429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 27800746429 in words is "twenty-seven billion, eight hundred million, seven hundred forty-six thousand, four hundred twenty-nine".