8007871428649 has 2 divisors, whose sum is σ = 8007871428650. Its totient is φ = 8007871428648.

The previous prime is 8007871428607. The next prime is 8007871428709. The reversal of 8007871428649 is 9468241787008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4147609218624 + 3860262210025 = 2036568^2 + 1964755^2 .

It is a cyclic number.

It is not a de Polignac number, because 8007871428649 - 2²³ = 8007863040041 is a prime.

It is not a weakly prime, because it can be changed into another prime (8007871428749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4003935714324 + 4003935714325.

It is an arithmetic number, because the mean of its divisors is an integer number (4003935714325).

Almost surely, 2^{8007871428649} is an apocalyptic number.

It is an amenable number.

8007871428649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8007871428649 is an equidigital number, since it uses as much as digits as its factorization.

8007871428649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43352064, while the sum is 64.

The spelling of 8007871428649 in words is "eight trillion, seven billion, eight hundred seventy-one million, four hundred twenty-eight thousand, six hundred forty-nine".