6447768153 has 4 divisors (see below), whose sum is σ = 8597024208. Its totient is φ = 4298512100.

The previous prime is 6447768149. The next prime is 6447768167. The reversal of 6447768153 is 3518677446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6447768153 - 2² = 6447768149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6447768096 and 6447768105.

It is not an unprimeable number, because it can be changed into a prime (6447768113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074628023 + ... + 1074628028.

It is an arithmetic number, because the mean of its divisors is an integer number (2149256052).

Almost surely, 2^6447768153 is an apocalyptic number.

It is an amenable number.

6447768153 is a deficient number, since it is larger than the sum of its proper divisors (2149256055).

6447768153 is a wasteful number, since it uses less digits than its factorization.

6447768153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149256054.

The product of its digits is 3386880, while the sum is 51.

The square root of 6447768153 is about 80297.9959463497. The cubic root of 6447768153 is about 1861.2432579995.

The spelling of 6447768153 in words is "six billion, four hundred forty-seven million, seven hundred sixty-eight thousand, one hundred fifty-three".