1387638264378 has 16 divisors (see below), whose sum is σ = 2921343714720. Its totient is φ = 438201557136.

The previous prime is 1387638264347. The next prime is 1387638264379. The reversal of 1387638264378 is 8734628367831.

It is not an unprimeable number, because it can be changed into a prime (1387638264379) 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, 6086132625 + ... + 6086132852.

It is an arithmetic number, because the mean of its divisors is an integer number (182583982170).

Almost surely, 2^{1387638264378} is an apocalyptic number.

1387638264378 is an abundant number, since it is smaller than the sum of its proper divisors (1533705450342).

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

1387638264378 is a wasteful number, since it uses less digits than its factorization.

1387638264378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12172265501.

The product of its digits is 195084288, while the sum is 66.

The spelling of 1387638264378 in words is "one trillion, three hundred eighty-seven billion, six hundred thirty-eight million, two hundred sixty-four thousand, three hundred seventy-eight".