1389645070639 has 8 divisors (see below), whose sum is σ = 1591348496000. Its totient is φ = 1188737320536.

The previous prime is 1389645070609. The next prime is 1389645070643. The reversal of 1389645070639 is 9360705469831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389645070639 - 2⁵ = 1389645070607 is a prime.

It is a super-2 number, since 2×1389645070639² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389645070609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198915069 + ... + 198922054.

It is an arithmetic number, because the mean of its divisors is an integer number (198918562000).

Almost surely, 2^{1389645070639} is an apocalyptic number.

1389645070639 is a deficient number, since it is larger than the sum of its proper divisors (201703425361).

1389645070639 is an equidigital number, since it uses as much as digits as its factorization.

1389645070639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397837629.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 1389645070639 in words is "one trillion, three hundred eighty-nine billion, six hundred forty-five million, seventy thousand, six hundred thirty-nine".