6448491506 has 16 divisors (see below), whose sum is σ = 9762717888. Its totient is φ = 3194334000.

The previous prime is 6448491499. The next prime is 6448491541. The reversal of 6448491506 is 6051948446.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140531 + ... + 180681.

It is an arithmetic number, because the mean of its divisors is an integer number (610169868).

Almost surely, 2^6448491506 is an apocalyptic number.

It is a pronic number, being equal to 80302×80303.

6448491506 is a deficient number, since it is larger than the sum of its proper divisors (3314226382).

6448491506 is a wasteful number, since it uses less digits than its factorization.

6448491506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40897.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 6448491506 is about 80302.4999984434. The cubic root of 6448491506 is about 1861.3128575632.

The spelling of 6448491506 in words is "six billion, four hundred forty-eight million, four hundred ninety-one thousand, five hundred six".