6999626815009 has 2 divisors, whose sum is σ = 6999626815010. Its totient is φ = 6999626815008.

The previous prime is 6999626815003. The next prime is 6999626815057. The reversal of 6999626815009 is 9005186269996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5184032261409 + 1815594553600 = 2276847^2 + 1347440^2 .

It is a cyclic number.

It is not a de Polignac number, because 6999626815009 - 2⁹ = 6999626814497 is a prime.

It is not a weakly prime, because it can be changed into another prime (6999626815003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499813407504 + 3499813407505.

It is an arithmetic number, because the mean of its divisors is an integer number (3499813407505).

Almost surely, 2^{6999626815009} is an apocalyptic number.

It is an amenable number.

6999626815009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6999626815009 is an equidigital number, since it uses as much as digits as its factorization.

6999626815009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113374080, while the sum is 70.

The spelling of 6999626815009 in words is "six trillion, nine hundred ninety-nine billion, six hundred twenty-six million, eight hundred fifteen thousand, nine".