1388752751525 has 12 divisors (see below), whose sum is σ = 1823350671972. Its totient is φ = 1045649130240.

The previous prime is 1388752751467. The next prime is 1388752751563. The reversal of 1388752751525 is 5251572578831.

It can be written as a sum of positive squares in 6 ways, for example, as 97843214401 + 1290909537124 = 312799^2 + 1136182^2 .

It is not a de Polignac number, because 1388752751525 - 2¹⁰ = 1388752750501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1633826342 + ... + 1633827191.

It is an arithmetic number, because the mean of its divisors is an integer number (151945889331).

Almost surely, 2^{1388752751525} is an apocalyptic number.

It is an amenable number.

1388752751525 is a deficient number, since it is larger than the sum of its proper divisors (434597920447).

1388752751525 is a wasteful number, since it uses less digits than its factorization.

1388752751525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267653560 (or 3267653555 counting only the distinct ones).

The product of its digits is 23520000, while the sum is 59.

The spelling of 1388752751525 in words is "one trillion, three hundred eighty-eight billion, seven hundred fifty-two million, seven hundred fifty-one thousand, five hundred twenty-five".