8709555641 has 2 divisors, whose sum is σ = 8709555642. Its totient is φ = 8709555640.

The previous prime is 8709555619. The next prime is 8709555671. The reversal of 8709555641 is 1465559078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8709555625 + 16 = 93325^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 8709555641 - 2⁶ = 8709555577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8709555641.

It is not a weakly prime, because it can be changed into another prime (8709555671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4354777820 + 4354777821.

It is an arithmetic number, because the mean of its divisors is an integer number (4354777821).

Almost surely, 2^8709555641 is an apocalyptic number.

It is an amenable number.

8709555641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8709555641 is an equidigital number, since it uses as much as digits as its factorization.

8709555641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The square root of 8709555641 is about 93325.0000857219. Note that the first 4 decimals coincide. The cubic root of 8709555641 is about 2057.4628362268.

The spelling of 8709555641 in words is "eight billion, seven hundred nine million, five hundred fifty-five thousand, six hundred forty-one".