8457736409 has 2 divisors, whose sum is σ = 8457736410. Its totient is φ = 8457736408.

The previous prime is 8457736393. The next prime is 8457736421. The reversal of 8457736409 is 9046377548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323825225 + 133911184 = 91235^2 + 11572^2 .

It is a cyclic number.

It is not a de Polignac number, because 8457736409 - 2⁴ = 8457736393 is a prime.

It is not a weakly prime, because it can be changed into another prime (8457736429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4228868204 + 4228868205.

It is an arithmetic number, because the mean of its divisors is an integer number (4228868205).

Almost surely, 2^8457736409 is an apocalyptic number.

It is an amenable number.

8457736409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8457736409 is an equidigital number, since it uses as much as digits as its factorization.

8457736409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The square root of 8457736409 is about 91965.9524443693. The cubic root of 8457736409 is about 2037.4394704891.

The spelling of 8457736409 in words is "eight billion, four hundred fifty-seven million, seven hundred thirty-six thousand, four hundred nine".