1313353855944 has 96 divisors (see below), whose sum is σ = 3834129499200. Its totient is φ = 403738162560.

The previous prime is 1313353855921. The next prime is 1313353855967. The reversal of 1313353855944 is 4495583533131.

1313353855944 is a `hidden beast` number, since 1 + 3 + 1 + 33 + 53 + 8 + 559 + 4 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1313353855921) and next prime (1313353855967).

It is a super-2 number, since 2×1313353855944² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378117 + ... + 1664235.

It is an arithmetic number, because the mean of its divisors is an integer number (39938848950).

Almost surely, 2^{1313353855944} 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 1313353855944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917064749600).

1313353855944 is an abundant number, since it is smaller than the sum of its proper divisors (2520775643256).

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

1313353855944 is a wasteful number, since it uses less digits than its factorization.

1313353855944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287235 (or 1287228 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 1313353855944 in words is "one trillion, three hundred thirteen billion, three hundred fifty-three million, eight hundred fifty-five thousand, nine hundred forty-four".