726837738449 has 2 divisors, whose sum is σ = 726837738450. Its totient is φ = 726837738448.

The previous prime is 726837738413. The next prime is 726837738541. The reversal of 726837738449 is 944837738627.

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., 693789043600 + 33048694849 = 832940^2 + 181793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726837738449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (726837738049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363418869224 + 363418869225.

It is an arithmetic number, because the mean of its divisors is an integer number (363418869225).

Almost surely, 2^726837738449 is an apocalyptic number.

It is an amenable number.

726837738449 is a deficient number, since it is larger than the sum of its proper divisors (1).

726837738449 is an equidigital number, since it uses as much as digits as its factorization.

726837738449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 341397504, while the sum is 68.

The spelling of 726837738449 in words is "seven hundred twenty-six billion, eight hundred thirty-seven million, seven hundred thirty-eight thousand, four hundred forty-nine".