123445567889 has 8 divisors (see below), whose sum is σ = 141540197568. Its totient is φ = 105465825360.

The previous prime is 123445567871. The next prime is 123445567891. The reversal of 123445567889 is 988765544321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-123445567889 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123445567829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28719482 + ... + 28723779.

It is an arithmetic number, because the mean of its divisors is an integer number (17692524696).

Almost surely, 2^123445567889 is an apocalyptic number.

It is an amenable number.

123445567889 is a deficient number, since it is larger than the sum of its proper divisors (18094629679).

123445567889 is an equidigital number, since it uses as much as digits as its factorization.

123445567889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57443575.

The product of its digits is 58060800, while the sum is 62.

The spelling of 123445567889 in words is "one hundred twenty-three billion, four hundred forty-five million, five hundred sixty-seven thousand, eight hundred eighty-nine".