1378386787712 has 64 divisors (see below), whose sum is σ = 2995840233360. Its totient is φ = 626497935360.

The previous prime is 1378386787709. The next prime is 1378386787717. The reversal of 1378386787712 is 2177876838731.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378386787717) 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, 33620858 + ... + 33661830.

Almost surely, 2^{1378386787712} is an apocalyptic number.

It is an amenable number.

1378386787712 is an abundant number, since it is smaller than the sum of its proper divisors (1617453445648).

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

1378386787712 is a wasteful number, since it uses less digits than its factorization.

1378386787712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64891 (or 64879 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 68.

The spelling of 1378386787712 in words is "one trillion, three hundred seventy-eight billion, three hundred eighty-six million, seven hundred eighty-seven thousand, seven hundred twelve".