1389612638225 has 24 divisors (see below), whose sum is σ = 2072925925440. Its totient is φ = 902725801920.

The previous prime is 1389612638213. The next prime is 1389612638243. The reversal of 1389612638225 is 5228362169831.

It is a happy number.

It is not a de Polignac number, because 1389612638225 - 2⁴ = 1389612638209 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, 208960982 + ... + 208967631.

It is an arithmetic number, because the mean of its divisors is an integer number (86371913560).

Almost surely, 2^{1389612638225} is an apocalyptic number.

It is an amenable number.

1389612638225 is a deficient number, since it is larger than the sum of its proper divisors (683313287215).

1389612638225 is a wasteful number, since it uses less digits than its factorization.

1389612638225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417928649 (or 417928644 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 56.

The spelling of 1389612638225 in words is "one trillion, three hundred eighty-nine billion, six hundred twelve million, six hundred thirty-eight thousand, two hundred twenty-five".