1378747422257 has 6 divisors (see below), whose sum is σ = 1455132321378. Its totient is φ = 1306181768112.

The previous prime is 1378747422229. The next prime is 1378747422313. The reversal of 1378747422257 is 7522247478731.

It can be written as a sum of positive squares in only one way, i.e., 1101735732496 + 277011689761 = 1049636^2 + 526319^2 .

It is not a de Polignac number, because 1378747422257 - 2¹² = 1378747418161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378747422196 and 1378747422205.

It is not an unprimeable number, because it can be changed into a prime (1378747922257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1909622108 + ... + 1909622829.

It is an arithmetic number, because the mean of its divisors is an integer number (242522053563).

Almost surely, 2^{1378747422257} is an apocalyptic number.

It is an amenable number.

1378747422257 is a deficient number, since it is larger than the sum of its proper divisors (76384899121).

1378747422257 is an equidigital number, since it uses as much as digits as its factorization.

1378747422257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819244975 (or 3819244956 counting only the distinct ones).

The product of its digits is 36879360, while the sum is 59.

The spelling of 1378747422257 in words is "one trillion, three hundred seventy-eight billion, seven hundred forty-seven million, four hundred twenty-two thousand, two hundred fifty-seven".