6420164235533 has 8 divisors (see below), whose sum is σ = 6516044842752. Its totient is φ = 6324285312576.

The previous prime is 6420164235509. The next prime is 6420164235577. The reversal of 6420164235533 is 3355324610246.

It is a happy number.

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 6420164235533 - 2⁴⁰ = 5320652607757 is a prime.

It is a super-2 number, since 2×6420164235533² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420164235593) 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, 8735141 + ... + 9441557.

It is an arithmetic number, because the mean of its divisors is an integer number (814505605344).

Almost surely, 2^{6420164235533} is an apocalyptic number.

It is an amenable number.

6420164235533 is a deficient number, since it is larger than the sum of its proper divisors (95880607219).

6420164235533 is a wasteful number, since it uses less digits than its factorization.

6420164235533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842131.

The product of its (nonzero) digits is 1555200, while the sum is 44.

Adding to 6420164235533 its reverse (3355324610246), we get a palindrome (9775488845779).

The spelling of 6420164235533 in words is "six trillion, four hundred twenty billion, one hundred sixty-four million, two hundred thirty-five thousand, five hundred thirty-three".