1389545688636 has 72 divisors (see below), whose sum is σ = 4025425098240. Its totient is φ = 395907142176.

The previous prime is 1389545688599. The next prime is 1389545688649. The reversal of 1389545688636 is 6368865459831.

1389545688636 is a `hidden beast` number, since 1 + 3 + 8 + 9 + 54 + 568 + 8 + 6 + 3 + 6 = 666.

It is a congruent number.

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, 7589296 + ... + 7770231.

It is an arithmetic number, because the mean of its divisors is an integer number (55908681920).

Almost surely, 2^{1389545688636} is an apocalyptic number.

It is an amenable number.

1389545688636 is an abundant number, since it is smaller than the sum of its proper divisors (2635879409604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389545688636 is a wasteful number, since it uses less digits than its factorization.

1389545688636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15359903 (or 15359898 counting only the distinct ones).

The product of its digits is 895795200, while the sum is 72.

The spelling of 1389545688636 in words is "one trillion, three hundred eighty-nine billion, five hundred forty-five million, six hundred eighty-eight thousand, six hundred thirty-six".