6447815051 has 2 divisors, whose sum is σ = 6447815052. Its totient is φ = 6447815050.

The previous prime is 6447815039. The next prime is 6447815069. The reversal of 6447815051 is 1505187446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6447815051 - 2⁶ = 6447814987 is a prime.

It is not a weakly prime, because it can be changed into another prime (6447815071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223907525 + 3223907526.

It is an arithmetic number, because the mean of its divisors is an integer number (3223907526).

Almost surely, 2^6447815051 is an apocalyptic number.

6447815051 is a deficient number, since it is larger than the sum of its proper divisors (1).

6447815051 is an equidigital number, since it uses as much as digits as its factorization.

6447815051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 6447815051 is about 80298.2879705414. The cubic root of 6447815051 is about 1861.2477705881.

The spelling of 6447815051 in words is "six billion, four hundred forty-seven million, eight hundred fifteen thousand, fifty-one".