6440126022 has 64 divisors (see below), whose sum is σ = 15741630720. Its totient is φ = 1951531560.

The previous prime is 6440125949. The next prime is 6440126029. The reversal of 6440126022 is 2206210446.

6440126022 is a `hidden beast` number, since 6 + 4 + 40 + 12 + 602 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440126029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27073 + ... + 116675.

It is an arithmetic number, because the mean of its divisors is an integer number (245962980).

Almost surely, 2^6440126022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6440126022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7870815360).

6440126022 is an abundant number, since it is smaller than the sum of its proper divisors (9301504698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6440126022 is a wasteful number, since it uses less digits than its factorization.

6440126022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89647 (or 89619 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 6440126022 is about 80250.3957747250. The cubic root of 6440126022 is about 1860.5076293957.

Adding to 6440126022 its reverse (2206210446), we get a palindrome (8646336468).

The spelling of 6440126022 in words is "six billion, four hundred forty million, one hundred twenty-six thousand, twenty-two".