6420811101 has 8 divisors (see below), whose sum is σ = 8561758560. Its totient is φ = 4280202192.

The previous prime is 6420811069. The next prime is 6420811153. The reversal of 6420811101 is 1011180246.

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

It is not a de Polignac number, because 6420811101 - 2⁵ = 6420811069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420811181) 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, 36466 + ... + 119043.

It is an arithmetic number, because the mean of its divisors is an integer number (1070219820).

Almost surely, 2^6420811101 is an apocalyptic number.

It is an amenable number.

6420811101 is a deficient number, since it is larger than the sum of its proper divisors (2140947459).

6420811101 is a wasteful number, since it uses less digits than its factorization.

6420811101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169275.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 6420811101 is about 80129.9638150424. The cubic root of 6420811101 is about 1858.6457847079.

Adding to 6420811101 its reverse (1011180246), we get a palindrome (7431991347).

The spelling of 6420811101 in words is "six billion, four hundred twenty million, eight hundred eleven thousand, one hundred one".