123444445679 has 4 divisors (see below), whose sum is σ = 123689862576. Its totient is φ = 123199028784.

The previous prime is 123444445633. The next prime is 123444445753. The reversal of 123444445679 is 976544444321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976544444321 = 997 ⋅979482893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123444445679 is a prime.

It is a super-3 number, since 3×123444445679³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

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 123444445679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123444445379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122707694 + ... + 122708699.

It is an arithmetic number, because the mean of its divisors is an integer number (30922465644).

Almost surely, 2^123444445679 is an apocalyptic number.

123444445679 is a deficient number, since it is larger than the sum of its proper divisors (245416897).

123444445679 is an equidigital number, since it uses as much as digits as its factorization.

123444445679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245416896.

The product of its digits is 11612160, while the sum is 53.

The spelling of 123444445679 in words is "one hundred twenty-three billion, four hundred forty-four million, four hundred forty-five thousand, six hundred seventy-nine".