5021621643 has 8 divisors (see below), whose sum is σ = 6926374800. Its totient is φ = 3232308128.

The previous prime is 5021621641. The next prime is 5021621651. The reversal of 5021621643 is 3461261205.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5021621643 - 2¹ = 5021621641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5021621643.

It is not an unprimeable number, because it can be changed into a prime (5021621641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28859808 + ... + 28859981.

It is an arithmetic number, because the mean of its divisors is an integer number (865796850).

Almost surely, 2^5021621643 is an apocalyptic number.

5021621643 is a deficient number, since it is larger than the sum of its proper divisors (1904753157).

5021621643 is a wasteful number, since it uses less digits than its factorization.

5021621643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57719821.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 5021621643 is about 70863.4012943212. The cubic root of 5021621643 is about 1712.4372349028.

Adding to 5021621643 its reverse (3461261205), we get a palindrome (8482882848).

The spelling of 5021621643 in words is "five billion, twenty-one million, six hundred twenty-one thousand, six hundred forty-three".