1378446448731 has 96 divisors (see below), whose sum is σ = 2108527131648. Its totient is φ = 799761600000.

The previous prime is 1378446448721. The next prime is 1378446448777.

1378446448731 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1378446448731 - 2⁵ = 1378446448699 is a prime.

It is a super-2 number, since 2×1378446448731² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378446448711) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 270228081 + ... + 270233181.

It is an arithmetic number, because the mean of its divisors is an integer number (21963824288).

Almost surely, 2^{1378446448731} is an apocalyptic number.

1378446448731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1378446448731 is a deficient number, since it is larger than the sum of its proper divisors (730080682917).

1378446448731 is a wasteful number, since it uses less digits than its factorization.

1378446448731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505 (or 5494 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 60.

The spelling of 1378446448731 in words is "one trillion, three hundred seventy-eight billion, four hundred forty-six million, four hundred forty-eight thousand, seven hundred thirty-one".