8475721408 has 224 divisors, whose sum is σ = 21887078400. Its totient is φ = 3160166400.

The previous prime is 8475721393. The next prime is 8475721417. The reversal of 8475721408 is 8041275748.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16651458 + ... + 16651966.

Almost surely, 2^8475721408 is an apocalyptic number.

8475721408 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8475721408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10943539200).

8475721408 is an abundant number, since it is smaller than the sum of its proper divisors (13411356992).

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

8475721408 is a wasteful number, since it uses less digits than its factorization.

8475721408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 46.

The square root of 8475721408 is about 92063.6812646551. The cubic root of 8475721408 is about 2038.8826227396.

The spelling of 8475721408 in words is "eight billion, four hundred seventy-five million, seven hundred twenty-one thousand, four hundred eight".