16572402709 has 2 divisors, whose sum is σ = 16572402710. Its totient is φ = 16572402708.

The previous prime is 16572402701. The next prime is 16572402731. The reversal of 16572402709 is 90720427561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15270780625 + 1301622084 = 123575^2 + 36078^2 .

It is a cyclic number.

It is not a de Polignac number, because 16572402709 - 2³ = 16572402701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16572402701) 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, 8286201354 + 8286201355.

It is an arithmetic number, because the mean of its divisors is an integer number (8286201355).

Almost surely, 2^16572402709 is an apocalyptic number.

It is an amenable number.

16572402709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16572402709 is an equidigital number, since it uses as much as digits as its factorization.

16572402709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 16572402709 in words is "sixteen billion, five hundred seventy-two million, four hundred two thousand, seven hundred nine".