1289638343829 has 16 divisors (see below), whose sum is σ = 1880072008704. Its totient is φ = 779834655600.

The previous prime is 1289638343827. The next prime is 1289638343837. The reversal of 1289638343829 is 9283438369821.

It is not a de Polignac number, because 1289638343829 - 2¹ = 1289638343827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1289638343829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289638343827) 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, 44093677 + ... + 44122914.

It is an arithmetic number, because the mean of its divisors is an integer number (117504500544).

Almost surely, 2^{1289638343829} is an apocalyptic number.

It is an amenable number.

1289638343829 is a deficient number, since it is larger than the sum of its proper divisors (590433664875).

1289638343829 is a wasteful number, since it uses less digits than its factorization.

1289638343829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88217048.

The product of its digits is 107495424, while the sum is 66.

The spelling of 1289638343829 in words is "one trillion, two hundred eighty-nine billion, six hundred thirty-eight million, three hundred forty-three thousand, eight hundred twenty-nine".