6421354633 has 4 divisors (see below), whose sum is σ = 6423065748. Its totient is φ = 6419643520.

The previous prime is 6421354579. The next prime is 6421354679. The reversal of 6421354633 is 3364531246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2133331344 + 4288023289 = 46188^2 + 65483^2 .

It is a cyclic number.

It is not a de Polignac number, because 6421354633 - 2²⁹ = 5884483721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6421354592 and 6421354601.

It is not an unprimeable number, because it can be changed into a prime (6421354333) 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, 849916 + ... + 857437.

It is an arithmetic number, because the mean of its divisors is an integer number (1605766437).

Almost surely, 2^6421354633 is an apocalyptic number.

It is an amenable number.

6421354633 is a deficient number, since it is larger than the sum of its proper divisors (1711115).

6421354633 is a wasteful number, since it uses less digits than its factorization.

6421354633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711114.

The product of its digits is 155520, while the sum is 37.

The square root of 6421354633 is about 80133.3553085106. The cubic root of 6421354633 is about 1858.6982290144.

Adding to 6421354633 its reverse (3364531246), we get a palindrome (9785885879).

The spelling of 6421354633 in words is "six billion, four hundred twenty-one million, three hundred fifty-four thousand, six hundred thirty-three".