1378311217044 has 12 divisors (see below), whose sum is σ = 3216059506464. Its totient is φ = 459437072344.

The previous prime is 1378311217009. The next prime is 1378311217051. The reversal of 1378311217044 is 4407121138731.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1378311217044² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1378311216987 and 1378311217005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57429634032 + ... + 57429634055.

It is an arithmetic number, because the mean of its divisors is an integer number (268004958872).

Almost surely, 2^{1378311217044} is an apocalyptic number.

It is an amenable number.

1378311217044 is an abundant number, since it is smaller than the sum of its proper divisors (1837748289420).

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

1378311217044 is a wasteful number, since it uses less digits than its factorization.

1378311217044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114859268094 (or 114859268092 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 1378311217044 in words is "one trillion, three hundred seventy-eight billion, three hundred eleven million, two hundred seventeen thousand, forty-four".