1389845405049 has 16 divisors (see below), whose sum is σ = 1861622240640. Its totient is φ = 922322580480.

The previous prime is 1389845404999. The next prime is 1389845405107. The reversal of 1389845405049 is 9405045489831.

It is not a de Polignac number, because 1389845405049 - 2⁷ = 1389845404921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389845404983 and 1389845405001.

It is not an unprimeable number, because it can be changed into a prime (1389845405149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45657 + ... + 1667865.

It is an arithmetic number, because the mean of its divisors is an integer number (116351390040).

Almost surely, 2^{1389845405049} is an apocalyptic number.

It is an amenable number.

1389845405049 is a deficient number, since it is larger than the sum of its proper divisors (471776835591).

1389845405049 is a wasteful number, since it uses less digits than its factorization.

1389845405049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623520.

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 1389845405049 in words is "one trillion, three hundred eighty-nine billion, eight hundred forty-five million, four hundred five thousand, forty-nine".