1389152478457 has 4 divisors (see below), whose sum is σ = 1389154953060. Its totient is φ = 1389150003856.

The previous prime is 1389152478437. The next prime is 1389152478547. The reversal of 1389152478457 is 7548742519831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 405050782096 + 984101696361 = 636436^2 + 992019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389152478457 - 2¹¹ = 1389152476409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389152478437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53883 + ... + 1667695.

It is an arithmetic number, because the mean of its divisors is an integer number (347288738265).

Almost surely, 2^{1389152478457} is an apocalyptic number.

It is an amenable number.

1389152478457 is a deficient number, since it is larger than the sum of its proper divisors (2474603).

1389152478457 is an equidigital number, since it uses as much as digits as its factorization.

1389152478457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474602.

The product of its digits is 67737600, while the sum is 64.

The spelling of 1389152478457 in words is "one trillion, three hundred eighty-nine billion, one hundred fifty-two million, four hundred seventy-eight thousand, four hundred fifty-seven".