6272643721 has 2 divisors, whose sum is σ = 6272643722. Its totient is φ = 6272643720.

The previous prime is 6272643667. The next prime is 6272643749. The reversal of 6272643721 is 1273462726.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6272640000 + 3721 = 79200^2 + 61^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6272643721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6272643761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3136321860 + 3136321861.

It is an arithmetic number, because the mean of its divisors is an integer number (3136321861).

Almost surely, 2^6272643721 is an apocalyptic number.

It is an amenable number.

6272643721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6272643721 is an equidigital number, since it uses as much as digits as its factorization.

6272643721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The square root of 6272643721 is about 79200.0234911581. The cubic root of 6272643721 is about 1844.2376063883.

It can be divided in two parts, 627264 and 3721, that multiplied together give a square (2334049344 = 48312²).

The spelling of 6272643721 in words is "six billion, two hundred seventy-two million, six hundred forty-three thousand, seven hundred twenty-one".