1375138877647 has 2 divisors, whose sum is σ = 1375138877648. Its totient is φ = 1375138877646.

The previous prime is 1375138877633. The next prime is 1375138877677. The reversal of 1375138877647 is 7467788315731.

It is a weak prime.

It is an emirp because it is prime and its reverse (7467788315731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375138877647 - 2³⁵ = 1340779139279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375138877677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687569438823 + 687569438824.

It is an arithmetic number, because the mean of its divisors is an integer number (687569438824).

Almost surely, 2^{1375138877647} is an apocalyptic number.

1375138877647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375138877647 is an equidigital number, since it uses as much as digits as its factorization.

1375138877647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165957120, while the sum is 67.

The spelling of 1375138877647 in words is "one trillion, three hundred seventy-five billion, one hundred thirty-eight million, eight hundred seventy-seven thousand, six hundred forty-seven".