1389251378067 has 32 divisors (see below), whose sum is σ = 2209097318400. Its totient is φ = 759307533600.

The previous prime is 1389251378059. The next prime is 1389251378101. The reversal of 1389251378067 is 7608731529831.

It is a happy number.

It is not a de Polignac number, because 1389251378067 - 2³ = 1389251378059 is a prime.

It is a super-2 number, since 2×1389251378067² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1389251378067.

It is not an unprimeable number, because it can be changed into a prime (1389251376067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13254934 + ... + 13359332.

It is an arithmetic number, because the mean of its divisors is an integer number (69034291200).

Almost surely, 2^{1389251378067} is an apocalyptic number.

1389251378067 is a deficient number, since it is larger than the sum of its proper divisors (819845940333).

1389251378067 is a wasteful number, since it uses less digits than its factorization.

1389251378067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131983.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 1389251378067 in words is "one trillion, three hundred eighty-nine billion, two hundred fifty-one million, three hundred seventy-eight thousand, sixty-seven".