15970217009 has 2 divisors, whose sum is σ = 15970217010. Its totient is φ = 15970217008.

The previous prime is 15970216981. The next prime is 15970217047. The reversal of 15970217009 is 90071207951.

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., 15550090000 + 420127009 = 124700^2 + 20497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15970217009 is a prime.

It is not a weakly prime, because it can be changed into another prime (15970217099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7985108504 + 7985108505.

It is an arithmetic number, because the mean of its divisors is an integer number (7985108505).

Almost surely, 2^15970217009 is an apocalyptic number.

It is an amenable number.

15970217009 is a deficient number, since it is larger than the sum of its proper divisors (1).

15970217009 is an equidigital number, since it uses as much as digits as its factorization.

15970217009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 41.

The spelling of 15970217009 in words is "fifteen billion, nine hundred seventy million, two hundred seventeen thousand, nine".