1388881337825 has 24 divisors (see below), whose sum is σ = 1886399497080. Its totient is φ = 1009685734400.

The previous prime is 1388881337749. The next prime is 1388881337849. The reversal of 1388881337825 is 5287331888831.

It can be written as a sum of positive squares in 12 ways, for example, as 358217811169 + 1030663526656 = 598513^2 + 1015216^2 .

It is not a de Polignac number, because 1388881337825 - 2²⁰ = 1388880289249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56331746 + ... + 56356395.

It is an arithmetic number, because the mean of its divisors is an integer number (78599979045).

Almost surely, 2^{1388881337825} is an apocalyptic number.

It is an amenable number.

1388881337825 is a deficient number, since it is larger than the sum of its proper divisors (497518159255).

1388881337825 is a wasteful number, since it uses less digits than its factorization.

1388881337825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112688197 (or 112688192 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 65.

The spelling of 1388881337825 in words is "one trillion, three hundred eighty-eight billion, eight hundred eighty-one million, three hundred thirty-seven thousand, eight hundred twenty-five".