6421533245 has 16 divisors (see below), whose sum is σ = 7739504640. Its totient is φ = 5114835264.

The previous prime is 6421533211. The next prime is 6421533253. The reversal of 6421533245 is 5423351246.

It is a cyclic number.

It is not a de Polignac number, because 6421533245 - 2¹⁴ = 6421516861 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164164 + ... + 1169666.

It is an arithmetic number, because the mean of its divisors is an integer number (483719040).

Almost surely, 2^6421533245 is an apocalyptic number.

It is an amenable number.

6421533245 is a deficient number, since it is larger than the sum of its proper divisors (1317971395).

6421533245 is a wasteful number, since it uses less digits than its factorization.

6421533245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6484.

The product of its digits is 86400, while the sum is 35.

The square root of 6421533245 is about 80134.4697680093. The cubic root of 6421533245 is about 1858.7154622801.

The spelling of 6421533245 in words is "six billion, four hundred twenty-one million, five hundred thirty-three thousand, two hundred forty-five".