1387638751375 has 16 divisors (see below), whose sum is σ = 1807067650752. Its totient is φ = 1061845303200.

The previous prime is 1387638751339. The next prime is 1387638751379. The reversal of 1387638751375 is 5731578367831.

It is a de Polignac number, because none of the positive numbers 2^k-1387638751375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387638751379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241325604 + ... + 241331353.

It is an arithmetic number, because the mean of its divisors is an integer number (112941728172).

Almost surely, 2^{1387638751375} is an apocalyptic number.

1387638751375 is a deficient number, since it is larger than the sum of its proper divisors (419428899377).

1387638751375 is an equidigital number, since it uses as much as digits as its factorization.

1387638751375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482656995 (or 482656985 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 64.

The spelling of 1387638751375 in words is "one trillion, three hundred eighty-seven billion, six hundred thirty-eight million, seven hundred fifty-one thousand, three hundred seventy-five".