6453181728 has 72 divisors (see below), whose sum is σ = 20972847168. Its totient is φ = 1843765632.

The previous prime is 6453181727. The next prime is 6453181741. The reversal of 6453181728 is 8271813546.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (6453181727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1598476 + ... + 1602507.

It is an arithmetic number, because the mean of its divisors is an integer number (291289544).

Almost surely, 2^6453181728 is an apocalyptic number.

It is an amenable number.

6453181728 is an abundant number, since it is smaller than the sum of its proper divisors (14519665440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6453181728 is a wasteful number, since it uses less digits than its factorization.

6453181728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201006 (or 3200995 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 6453181728 is about 80331.6981520993. The cubic root of 6453181728 is about 1861.7640150067.

The spelling of 6453181728 in words is "six billion, four hundred fifty-three million, one hundred eighty-one thousand, seven hundred twenty-eight".