1626729644149 has 2 divisors, whose sum is σ = 1626729644150. Its totient is φ = 1626729644148.

The previous prime is 1626729644147. The next prime is 1626729644213. The reversal of 1626729644149 is 9414469276261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280993876100 + 345735768049 = 1131810^2 + 587993^2 .

It is a cyclic number.

It is not a de Polignac number, because 1626729644149 - 2¹ = 1626729644147 is a prime.

Together with 1626729644147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1626729644147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813364822074 + 813364822075.

It is an arithmetic number, because the mean of its divisors is an integer number (813364822075).

Almost surely, 2^{1626729644149} is an apocalyptic number.

It is an amenable number.

1626729644149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1626729644149 is an equidigital number, since it uses as much as digits as its factorization.

1626729644149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 61.

The spelling of 1626729644149 in words is "one trillion, six hundred twenty-six billion, seven hundred twenty-nine million, six hundred forty-four thousand, one hundred forty-nine".