1226649645312 has 576 divisors, whose sum is σ = 4332892784640. Its totient is φ = 298996531200.

The previous prime is 1226649645301. The next prime is 1226649645317. The reversal of 1226649645312 is 2135469466221.

It is not an unprimeable number, because it can be changed into a prime (1226649645317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54431487 + ... + 54454017.

Almost surely, 2^{1226649645312} is an apocalyptic number.

1226649645312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226649645312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2166446392320).

1226649645312 is an abundant number, since it is smaller than the sum of its proper divisors (3106243139328).

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

1226649645312 is a wasteful number, since it uses less digits than its factorization.

1226649645312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22630 (or 22616 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The spelling of 1226649645312 in words is "one trillion, two hundred twenty-six billion, six hundred forty-nine million, six hundred forty-five thousand, three hundred twelve".