13446489737 has 2 divisors, whose sum is σ = 13446489738. Its totient is φ = 13446489736.

The previous prime is 13446489733. The next prime is 13446489743. The reversal of 13446489737 is 73798464431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13285098121 + 161391616 = 115261^2 + 12704^2 .

It is a cyclic number.

It is not a de Polignac number, because 13446489737 - 2² = 13446489733 is a prime.

It is not a weakly prime, because it can be changed into another prime (13446489733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6723244868 + 6723244869.

It is an arithmetic number, because the mean of its divisors is an integer number (6723244869).

Almost surely, 2^13446489737 is an apocalyptic number.

It is an amenable number.

13446489737 is a deficient number, since it is larger than the sum of its proper divisors (1).

13446489737 is an equidigital number, since it uses as much as digits as its factorization.

13446489737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 56.

Subtracting from 13446489737 its sum of digits (56), we obtain a square (13446489681 = 115959²).

The spelling of 13446489737 in words is "thirteen billion, four hundred forty-six million, four hundred eighty-nine thousand, seven hundred thirty-seven".