1378740686361 has 8 divisors (see below), whose sum is σ = 1838723456064. Its totient is φ = 918959187120.

The previous prime is 1378740686303. The next prime is 1378740686369. The reversal of 1378740686361 is 1636860478731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1378740686361 - 2¹¹ = 1378740684313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378740686295 and 1378740686304.

It is not an unprimeable number, because it can be changed into a prime (1378740686369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50301630 + ... + 50329031.

It is an arithmetic number, because the mean of its divisors is an integer number (229840432008).

Almost surely, 2^{1378740686361} is an apocalyptic number.

It is an amenable number.

1378740686361 is a deficient number, since it is larger than the sum of its proper divisors (459982769703).

1378740686361 is a wasteful number, since it uses less digits than its factorization.

1378740686361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100635231.

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 1378740686361 in words is "one trillion, three hundred seventy-eight billion, seven hundred forty million, six hundred eighty-six thousand, three hundred sixty-one".