5115550440 has 512 divisors, whose sum is σ = 21180579840. Its totient is φ = 953856000.

The previous prime is 5115550399. The next prime is 5115550441. The reversal of 5115550440 is 440555115.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 5115550398 and 5115550407.

It is not an unprimeable number, because it can be changed into a prime (5115550441) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4443865 + ... + 4445015.

It is an arithmetic number, because the mean of its divisors is an integer number (41368320).

Almost surely, 2^5115550440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5115550440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10590289920).

5115550440 is an abundant number, since it is smaller than the sum of its proper divisors (16065029400).

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

5115550440 is a wasteful number, since it uses less digits than its factorization.

5115550440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 5115550440 is about 71523.0762761222. The cubic root of 5115550440 is about 1723.0483215691.

It can be divided in two parts, 5115 and 550440, that added together give a palindrome (555555).

The spelling of 5115550440 in words is "five billion, one hundred fifteen million, five hundred fifty thousand, four hundred forty".