1646522268 has 12 divisors (see below), whose sum is σ = 3841885320. Its totient is φ = 548840752.

The previous prime is 1646522261. The next prime is 1646522279. The reversal of 1646522268 is 8622256461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1646522268² = 5422071158039727648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646522261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68605083 + ... + 68605106.

It is an arithmetic number, because the mean of its divisors is an integer number (320157110).

Almost surely, 2^1646522268 is an apocalyptic number.

It is an amenable number.

1646522268 is an abundant number, since it is smaller than the sum of its proper divisors (2195363052).

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

1646522268 is a wasteful number, since it uses less digits than its factorization.

1646522268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137210196 (or 137210194 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 1646522268 is about 40577.3615209269. The cubic root of 1646522268 is about 1180.8349610915.

The spelling of 1646522268 in words is "one billion, six hundred forty-six million, five hundred twenty-two thousand, two hundred sixty-eight".