1389121997152 has 48 divisors (see below), whose sum is σ = 2908692001152. Its totient is φ = 650773002240.

The previous prime is 1389121997143. The next prime is 1389121997173. The reversal of 1389121997152 is 2517991219831.

It is a super-4 number, since 4×1389121997152⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5604099 + ... + 5846722.

It is an arithmetic number, because the mean of its divisors is an integer number (60597750024).

Almost surely, 2^{1389121997152} is an apocalyptic number.

It is an amenable number.

1389121997152 is an abundant number, since it is smaller than the sum of its proper divisors (1519570004000).

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

1389121997152 is a wasteful number, since it uses less digits than its factorization.

1389121997152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11451071 (or 11451063 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 58.

The spelling of 1389121997152 in words is "one trillion, three hundred eighty-nine billion, one hundred twenty-one million, nine hundred ninety-seven thousand, one hundred fifty-two".