6448620487 has 2 divisors, whose sum is σ = 6448620488. Its totient is φ = 6448620486.

The previous prime is 6448620449. The next prime is 6448620547. The reversal of 6448620487 is 7840268446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6448620487 - 2¹¹ = 6448618439 is a prime.

It is a super-2 number, since 2×6448620487² = 83169412370712234338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6448620487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6448620287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224310243 + 3224310244.

It is an arithmetic number, because the mean of its divisors is an integer number (3224310244).

Almost surely, 2^6448620487 is an apocalyptic number.

6448620487 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448620487 is an equidigital number, since it uses as much as digits as its factorization.

6448620487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The square root of 6448620487 is about 80303.3030889764. The cubic root of 6448620487 is about 1861.3252673076.

The spelling of 6448620487 in words is "six billion, four hundred forty-eight million, six hundred twenty thousand, four hundred eighty-seven".