5221620640 has 24 divisors (see below), whose sum is σ = 12336079140. Its totient is φ = 2088648192.

The previous prime is 5221620629. The next prime is 5221620643. The reversal of 5221620640 is 460261225.

It can be written as a sum of positive squares in 2 ways, for example, as 5200717456 + 20903184 = 72116^2 + 4572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5221620599 and 5221620608.

It is not an unprimeable number, because it can be changed into a prime (5221620643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16317405 + ... + 16317724.

Almost surely, 2^5221620640 is an apocalyptic number.

It is an amenable number.

5221620640 is an abundant number, since it is smaller than the sum of its proper divisors (7114458500).

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

5221620640 is a wasteful number, since it uses less digits than its factorization.

5221620640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32635144 (or 32635136 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 5221620640 is about 72260.7821712442. The cubic root of 5221620640 is about 1734.8759987452.

Adding to 5221620640 its reverse (460261225), we get a palindrome (5681881865).

The spelling of 5221620640 in words is "five billion, two hundred twenty-one million, six hundred twenty thousand, six hundred forty".