6747421649 has 2 divisors, whose sum is σ = 6747421650. Its totient is φ = 6747421648.

The previous prime is 6747421643. The next prime is 6747421693. The reversal of 6747421649 is 9461247476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5476000000 + 1271421649 = 74000^2 + 35657^2 .

It is a cyclic number.

It is not a de Polignac number, because 6747421649 - 2⁴ = 6747421633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6747421597 and 6747421606.

It is not a weakly prime, because it can be changed into another prime (6747421643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3373710824 + 3373710825.

It is an arithmetic number, because the mean of its divisors is an integer number (3373710825).

Almost surely, 2^6747421649 is an apocalyptic number.

It is an amenable number.

6747421649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6747421649 is an equidigital number, since it uses as much as digits as its factorization.

6747421649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The square root of 6747421649 is about 82142.6907825645. The cubic root of 6747421649 is about 1889.6409131825.

The spelling of 6747421649 in words is "six billion, seven hundred forty-seven million, four hundred twenty-one thousand, six hundred forty-nine".