6514604749721 has 2 divisors, whose sum is σ = 6514604749722. Its totient is φ = 6514604749720.

The previous prime is 6514604749691. The next prime is 6514604749729. The reversal of 6514604749721 is 1279474064156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6505534854025 + 9069895696 = 2550595^2 + 95236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6514604749721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6514604749729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3257302374860 + 3257302374861.

It is an arithmetic number, because the mean of its divisors is an integer number (3257302374861).

Almost surely, 2^{6514604749721} is an apocalyptic number.

It is an amenable number.

6514604749721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6514604749721 is an equidigital number, since it uses as much as digits as its factorization.

6514604749721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 6514604749721 in words is "six trillion, five hundred fourteen billion, six hundred four million, seven hundred forty-nine thousand, seven hundred twenty-one".