6445168522 has 16 divisors (see below), whose sum is σ = 10747279872. Its totient is φ = 2878734960.

The previous prime is 6445168511. The next prime is 6445168529. The reversal of 6445168522 is 2258615446.

It is not an unprimeable number, because it can be changed into a prime (6445168529) 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, 3997438 + ... + 3999049.

It is an arithmetic number, because the mean of its divisors is an integer number (671704992).

Almost surely, 2^6445168522 is an apocalyptic number.

6445168522 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6445168522 is a deficient number, since it is larger than the sum of its proper divisors (4302111350).

6445168522 is a wasteful number, since it uses less digits than its factorization.

6445168522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7996533.

The product of its digits is 460800, while the sum is 43.

The square root of 6445168522 is about 80281.8069178815. The cubic root of 6445168522 is about 1860.9930837803.

The spelling of 6445168522 in words is "six billion, four hundred forty-five million, one hundred sixty-eight thousand, five hundred twenty-two".