1268183646 has 48 divisors (see below), whose sum is σ = 2932360704. Its totient is φ = 394716672.

The previous prime is 1268183641. The next prime is 1268183677. The reversal of 1268183646 is 6463818621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268183641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22546 + ... + 55178.

It is an arithmetic number, because the mean of its divisors is an integer number (61090848).

Almost surely, 2^1268183646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268183646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1466180352).

1268183646 is an abundant number, since it is smaller than the sum of its proper divisors (1664177058).

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

1268183646 is a wasteful number, since it uses less digits than its factorization.

1268183646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32785 (or 32782 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1268183646 is about 35611.5661829131. The cubic root of 1268183646 is about 1082.4156166678.

The spelling of 1268183646 in words is "one billion, two hundred sixty-eight million, one hundred eighty-three thousand, six hundred forty-six".