1382638881257 has 2 divisors, whose sum is σ = 1382638881258. Its totient is φ = 1382638881256.

The previous prime is 1382638881251. The next prime is 1382638881269. The reversal of 1382638881257 is 7521888362831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 761472645376 + 621166235881 = 872624^2 + 788141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382638881257 - 2⁶ = 1382638881193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1382638881257.

It is not a weakly prime, because it can be changed into another prime (1382638881251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691319440628 + 691319440629.

It is an arithmetic number, because the mean of its divisors is an integer number (691319440629).

Almost surely, 2^{1382638881257} is an apocalyptic number.

It is an amenable number.

1382638881257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382638881257 is an equidigital number, since it uses as much as digits as its factorization.

1382638881257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30965760, while the sum is 62.

The spelling of 1382638881257 in words is "one trillion, three hundred eighty-two billion, six hundred thirty-eight million, eight hundred eighty-one thousand, two hundred fifty-seven".