6440156022 has 16 divisors (see below), whose sum is σ = 12886690752. Its totient is φ = 2145655560.

The previous prime is 6440156011. The next prime is 6440156029. The reversal of 6440156022 is 2206510446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440156029) 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, 252604 + ... + 276927.

It is an arithmetic number, because the mean of its divisors is an integer number (805418172).

Almost surely, 2^6440156022 is an apocalyptic number.

6440156022 is an abundant number, since it is smaller than the sum of its proper divisors (6446534730).

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

6440156022 is a wasteful number, since it uses less digits than its factorization.

6440156022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531563.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 6440156022 is about 80250.5826894734. The cubic root of 6440156022 is about 1860.5105183217.

Adding to 6440156022 its reverse (2206510446), we get a palindrome (8646666468).

The spelling of 6440156022 in words is "six billion, four hundred forty million, one hundred fifty-six thousand, twenty-two".