1378063683361 has 4 divisors (see below), whose sum is σ = 1378163636500. Its totient is φ = 1377963730224.

The previous prime is 1378063683341. The next prime is 1378063683371. The reversal of 1378063683361 is 1633863608731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1330296958225 + 47766725136 = 1153385^2 + 218556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378063683361 - 2²⁵ = 1378030128929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378063683341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49955886 + ... + 49983463.

It is an arithmetic number, because the mean of its divisors is an integer number (344540909125).

Almost surely, 2^{1378063683361} is an apocalyptic number.

It is an amenable number.

1378063683361 is a deficient number, since it is larger than the sum of its proper divisors (99953139).

1378063683361 is an equidigital number, since it uses as much as digits as its factorization.

1378063683361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99953138.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 1378063683361 in words is "one trillion, three hundred seventy-eight billion, sixty-three million, six hundred eighty-three thousand, three hundred sixty-one".