123456667789 has 48 divisors (see below), whose sum is σ = 156586808448. Its totient is φ = 94783074048.

The previous prime is 123456667751. The next prime is 123456667843. The reversal of 123456667789 is 987766654321.

It is not a de Polignac number, because 123456667789 - 2¹⁷ = 123456536717 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 123456667789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123456667729) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 55187379 + ... + 55189615.

It is an arithmetic number, because the mean of its divisors is an integer number (3262225176).

Almost surely, 2^123456667789 is an apocalyptic number.

It is an amenable number.

123456667789 is a deficient number, since it is larger than the sum of its proper divisors (33130140659).

123456667789 is a wasteful number, since it uses less digits than its factorization.

123456667789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774 (or 2737 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 64.

The spelling of 123456667789 in words is "one hundred twenty-three billion, four hundred fifty-six million, six hundred sixty-seven thousand, seven hundred eighty-nine".