1244609888256 has 1440 divisors, whose sum is σ = 4699121236992. Its totient is φ = 321052999680.

The previous prime is 1244609888227. The next prime is 1244609888261. The reversal of 1244609888256 is 6528889064421.

1244609888256 is a `hidden beast` number, since 1 + 2 + 4 + 460 + 98 + 8 + 82 + 5 + 6 = 666.

It is a super-2 number, since 2×1244609888256² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1244609888193 and 1244609888202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17529716701 + ... + 17529716771.

Almost surely, 2^{1244609888256} is an apocalyptic number.

1244609888256 is a gapful number since it is divisible by the number (16) 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 1244609888256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349560618496).

1244609888256 is an abundant number, since it is smaller than the sum of its proper divisors (3454511348736).

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

1244609888256 is an frugal number, since it uses more digits than its factorization.

1244609888256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 63.

The spelling of 1244609888256 in words is "one trillion, two hundred forty-four billion, six hundred nine million, eight hundred eighty-eight thousand, two hundred fifty-six".