6721536319 has 2 divisors, whose sum is σ = 6721536320. Its totient is φ = 6721536318.

The previous prime is 6721536301. The next prime is 6721536329. The reversal of 6721536319 is 9136351276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6721536319 - 2¹³ = 6721528127 is a prime.

It is a super-2 number, since 2×6721536319² = 90358100975272139522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6721536329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360768159 + 3360768160.

It is an arithmetic number, because the mean of its divisors is an integer number (3360768160).

Almost surely, 2^6721536319 is an apocalyptic number.

6721536319 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721536319 is an equidigital number, since it uses as much as digits as its factorization.

6721536319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 6721536319 is about 81984.9761785658. The cubic root of 6721536319 is about 1887.2213883694.

The spelling of 6721536319 in words is "six billion, seven hundred twenty-one million, five hundred thirty-six thousand, three hundred nineteen".