4451647680 has 112 divisors (see below), whose sum is σ = 15704454240. Its totient is φ = 1187103744.

The previous prime is 4451647679. The next prime is 4451647687. The reversal of 4451647680 is 867461544.

4451647680 is a `hidden beast` number, since 445 + 1 + 64 + 76 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (4451647687) 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 15 ways as a sum of consecutive naturals, for example, 248979 + ... + 266258.

Almost surely, 2^4451647680 is an apocalyptic number.

4451647680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4451647680 is an abundant number, since it is smaller than the sum of its proper divisors (11252806560).

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

4451647680 is a wasteful number, since it uses less digits than its factorization.

4451647680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515263 (or 515247 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 4451647680 is about 66720.6690613936. The cubic root of 4451647680 is about 1645.0291387810.

The spelling of 4451647680 in words is "four billion, four hundred fifty-one million, six hundred forty-seven thousand, six hundred eighty".