6503898449749 has 2 divisors, whose sum is σ = 6503898449750. Its totient is φ = 6503898449748.

The previous prime is 6503898449723. The next prime is 6503898449861. The reversal of 6503898449749 is 9479448983056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6222555195025 + 281343254724 = 2494505^2 + 530418^2 .

It is a cyclic number.

It is not a de Polignac number, because 6503898449749 - 2⁷ = 6503898449621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6503898549749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3251949224874 + 3251949224875.

It is an arithmetic number, because the mean of its divisors is an integer number (3251949224875).

Almost surely, 2^{6503898449749} is an apocalyptic number.

It is an amenable number.

6503898449749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6503898449749 is an equidigital number, since it uses as much as digits as its factorization.

6503898449749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881169920, while the sum is 76.

The spelling of 6503898449749 in words is "six trillion, five hundred three billion, eight hundred ninety-eight million, four hundred forty-nine thousand, seven hundred forty-nine".