4417721540 has 24 divisors (see below), whose sum is σ = 9765490560. Its totient is φ = 1674083808.

The previous prime is 4417721531. The next prime is 4417721551. The reversal of 4417721540 is 451277144.

It is a self number, because there is not a number n which added to its sum of digits gives 4417721540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5812412 + ... + 5813171.

It is an arithmetic number, because the mean of its divisors is an integer number (406895440).

Almost surely, 2^4417721540 is an apocalyptic number.

It is an amenable number.

4417721540 is an abundant number, since it is smaller than the sum of its proper divisors (5347769020).

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

4417721540 is a wasteful number, since it uses less digits than its factorization.

4417721540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11625611 (or 11625609 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 4417721540 is about 66465.9427075250. The cubic root of 4417721540 is about 1640.8395389235.

Adding to 4417721540 its reverse (451277144), we get a palindrome (4868998684).

The spelling of 4417721540 in words is "four billion, four hundred seventeen million, seven hundred twenty-one thousand, five hundred forty".