6447688451 has 12 divisors (see below), whose sum is σ = 6547558992. Its totient is φ = 6348739488.

The previous prime is 6447688441. The next prime is 6447688469. The reversal of 6447688451 is 1548867446.

It is not a de Polignac number, because 6447688451 - 2¹⁴ = 6447672067 is a prime.

It is a super-2 number, since 2×6447688451² = 83145372722317558802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6447688393 and 6447688402.

It is not an unprimeable number, because it can be changed into a prime (6447688441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3996521 + ... + 3998133.

It is an arithmetic number, because the mean of its divisors is an integer number (545629916).

Almost surely, 2^6447688451 is an apocalyptic number.

6447688451 is a deficient number, since it is larger than the sum of its proper divisors (99870541).

6447688451 is a wasteful number, since it uses less digits than its factorization.

6447688451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110 (or 1913 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 53.

The square root of 6447688451 is about 80297.4996559669. The cubic root of 6447688451 is about 1861.2355889158.

The spelling of 6447688451 in words is "six billion, four hundred forty-seven million, six hundred eighty-eight thousand, four hundred fifty-one".