1389029671018 has 12 divisors (see below), whose sum is σ = 2290177019970. Its totient is φ = 631377123080.

The previous prime is 1389029671013. The next prime is 1389029671061. The reversal of 1389029671018 is 8101769209831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1363226710329 + 25802960689 = 1167573^2 + 160633^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1389029671018.

It is not an unprimeable number, because it can be changed into a prime (1389029671013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2869895773 + ... + 2869896256.

Almost surely, 2^{1389029671018} is an apocalyptic number.

1389029671018 is a deficient number, since it is larger than the sum of its proper divisors (901147348952).

1389029671018 is a wasteful number, since it uses less digits than its factorization.

1389029671018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739792053 (or 5739792042 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 1389029671018 in words is "one trillion, three hundred eighty-nine billion, twenty-nine million, six hundred seventy-one thousand, eighteen".