123445555679 has 4 divisors (see below), whose sum is σ = 128812753776. Its totient is φ = 118078357584.

The previous prime is 123445555663. The next prime is 123445555687. The reversal of 123445555679 is 976555544321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123445555679 - 2⁴ = 123445555663 is a prime.

It is a super-3 number, since 3×123445555679³ (a number of 34 digits) contains 333 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123445555619) 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, 2683599014 + ... + 2683599059.

It is an arithmetic number, because the mean of its divisors is an integer number (32203188444).

Almost surely, 2^123445555679 is an apocalyptic number.

123445555679 is a deficient number, since it is larger than the sum of its proper divisors (5367198097).

123445555679 is an equidigital number, since it uses as much as digits as its factorization.

123445555679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367198096.

The product of its digits is 22680000, while the sum is 56.

The spelling of 123445555679 in words is "one hundred twenty-three billion, four hundred forty-five million, five hundred fifty-five thousand, six hundred seventy-nine".