6419476649 has 2 divisors, whose sum is σ = 6419476650. Its totient is φ = 6419476648.

The previous prime is 6419476643. The next prime is 6419476729. The reversal of 6419476649 is 9466749146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5649025600 + 770451049 = 75160^2 + 27757^2 .

It is a cyclic number.

It is not a de Polignac number, because 6419476649 - 2³² = 2124509353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6419476594 and 6419476603.

It is not a weakly prime, because it can be changed into another prime (6419476643) 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, 3209738324 + 3209738325.

It is an arithmetic number, because the mean of its divisors is an integer number (3209738325).

Almost surely, 2^6419476649 is an apocalyptic number.

It is an amenable number.

6419476649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6419476649 is an equidigital number, since it uses as much as digits as its factorization.

6419476649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 56.

The square root of 6419476649 is about 80121.6365846330. The cubic root of 6419476649 is about 1858.5170135713.

The spelling of 6419476649 in words is "six billion, four hundred nineteen million, four hundred seventy-six thousand, six hundred forty-nine".