123444456779 has 8 divisors (see below), whose sum is σ = 141122143968. Its totient is φ = 105777460800.

The previous prime is 123444456767. The next prime is 123444456799. The reversal of 123444456779 is 977654444321.

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

It is a cyclic number.

It is not a de Polignac number, because 123444456779 - 2²⁰ = 123443408203 is a prime.

It is a super-3 number, since 3×123444456779³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123444456799) 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, 2648042 + ... + 2694255.

It is an arithmetic number, because the mean of its divisors is an integer number (17640267996).

Almost surely, 2^123444456779 is an apocalyptic number.

123444456779 is a deficient number, since it is larger than the sum of its proper divisors (17677687189).

123444456779 is an equidigital number, since it uses as much as digits as its factorization.

123444456779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345605.

The product of its digits is 20321280, while the sum is 56.

The spelling of 123444456779 in words is "one hundred twenty-three billion, four hundred forty-four million, four hundred fifty-six thousand, seven hundred seventy-nine".