5021396640 has 144 divisors (see below), whose sum is σ = 18453701448. Its totient is φ = 1236031488.

The previous prime is 5021396629. The next prime is 5021396683. The reversal of 5021396640 is 466931205.

It is a happy number.

5021396640 is a `hidden beast` number, since 5 + 0 + 2 + 1 + 3 + 9 + 6 + 640 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3330213264 + 1691183376 = 57708^2 + 41124^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×5021396640³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5021396595 and 5021396604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115399 + ... + 152838.

Almost surely, 2^5021396640 is an apocalyptic number.

It is an amenable number.

5021396640 is an abundant number, since it is smaller than the sum of its proper divisors (13432304808).

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

5021396640 is a wasteful number, since it uses less digits than its factorization.

5021396640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268271 (or 268260 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 5021396640 is about 70861.8136939777. The cubic root of 5021396640 is about 1712.4116582201.

The spelling of 5021396640 in words is "five billion, twenty-one million, three hundred ninety-six thousand, six hundred forty".