5130121644 has 108 divisors (see below), whose sum is σ = 13378890616. Its totient is φ = 1657304064.

The previous prime is 5130121621. The next prime is 5130121649. The reversal of 5130121644 is 4461210315.

It is a happy number.

5130121644 is a `hidden beast` number, since 5 + 1 + 3 + 0 + 12 + 1 + 644 = 666.

It is not an unprimeable number, because it can be changed into a prime (5130121649) 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 35 ways as a sum of consecutive naturals, for example, 9808767 + ... + 9809289.

Almost surely, 2^5130121644 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 5130121644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6689445308).

5130121644 is an abundant number, since it is smaller than the sum of its proper divisors (8248768972).

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

5130121644 is a wasteful number, since it uses less digits than its factorization.

5130121644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 5130121644 is about 71624.8674972596. The cubic root of 5130121644 is about 1724.6827555218.

Adding to 5130121644 its reverse (4461210315), we get a palindrome (9591331959).

The spelling of 5130121644 in words is "five billion, one hundred thirty million, one hundred twenty-one thousand, six hundred forty-four".