1388751251263 has 2 divisors, whose sum is σ = 1388751251264. Its totient is φ = 1388751251262.

The previous prime is 1388751251257. The next prime is 1388751251267. The reversal of 1388751251263 is 3621521578831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1388751251263 - 2⁵ = 1388751251231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1388751251263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388751251267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694375625631 + 694375625632.

It is an arithmetic number, because the mean of its divisors is an integer number (694375625632).

Almost surely, 2^{1388751251263} is an apocalyptic number.

1388751251263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388751251263 is an equidigital number, since it uses as much as digits as its factorization.

1388751251263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The spelling of 1388751251263 in words is "one trillion, three hundred eighty-eight billion, seven hundred fifty-one million, two hundred fifty-one thousand, two hundred sixty-three".