1227805165344 has 96 divisors (see below), whose sum is σ = 3264740640000. Its totient is φ = 403969572864.

The previous prime is 1227805165333. The next prime is 1227805165357. The reversal of 1227805165344 is 4435615087221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1227805165293 and 1227805165302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28107232 + ... + 28150880.

It is an arithmetic number, because the mean of its divisors is an integer number (34007715000).

Almost surely, 2^{1227805165344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227805165344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632370320000).

1227805165344 is an abundant number, since it is smaller than the sum of its proper divisors (2036935474656).

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

1227805165344 is a wasteful number, since it uses less digits than its factorization.

1227805165344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47450 (or 47442 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 1227805165344 in words is "one trillion, two hundred twenty-seven billion, eight hundred five million, one hundred sixty-five thousand, three hundred forty-four".