4105521640 has 64 divisors (see below), whose sum is σ = 10133061120. Its totient is φ = 1484640000.

The previous prime is 4105521631. The next prime is 4105521649. The reversal of 4105521640 is 461255014.

It is an interprime number because it is at equal distance from previous prime (4105521631) and next prime (4105521649).

It is a junction number, because it is equal to n+sod(n) for n = 4105521599 and 4105521608.

It is not an unprimeable number, because it can be changed into a prime (4105521649) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53865 + ... + 105415.

It is an arithmetic number, because the mean of its divisors is an integer number (158329080).

Almost surely, 2^4105521640 is an apocalyptic number.

4105521640 is a gapful number since it is divisible by the number (40) 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 4105521640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5066530560).

4105521640 is an abundant number, since it is smaller than the sum of its proper divisors (6027539480).

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

4105521640 is a wasteful number, since it uses less digits than its factorization.

4105521640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51754 (or 51750 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 4105521640 is about 64074.3446318415. The cubic root of 4105521640 is about 1601.2388374286.

Adding to 4105521640 its reverse (461255014), we get a palindrome (4566776654).

The spelling of 4105521640 in words is "four billion, one hundred five million, five hundred twenty-one thousand, six hundred forty".