1244371661064 has 192 divisors, whose sum is σ = 3872983870080. Its totient is φ = 353566080000.

The previous prime is 1244371661063. The next prime is 1244371661069. The reversal of 1244371661064 is 4601661734421.

1244371661064 is a `hidden beast` number, since 1 + 24 + 4 + 3 + 7 + 1 + 6 + 610 + 6 + 4 = 666.

It is a super-2 number, since 2×1244371661064² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1244371661063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157491514 + ... + 157499414.

It is an arithmetic number, because the mean of its divisors is an integer number (20171790990).

Almost surely, 2^{1244371661064} is an apocalyptic number.

1244371661064 is a gapful number since it is divisible by the number (14) 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 1244371661064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936491935040).

1244371661064 is an abundant number, since it is smaller than the sum of its proper divisors (2628612209016).

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

1244371661064 is a wasteful number, since it uses less digits than its factorization.

1244371661064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9612 (or 9605 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 1244371661064 in words is "one trillion, two hundred forty-four billion, three hundred seventy-one million, six hundred sixty-one thousand, sixty-four".