123243479424 has 128 divisors (see below), whose sum is σ = 391719535200. Its totient is φ = 37921056768.

The previous prime is 123243479399. The next prime is 123243479453. The reversal of 123243479424 is 424974342321.

123243479424 is a `hidden beast` number, since 123 + 2 + 4 + 34 + 79 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×123243479424² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123243479424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326639 + ... + 1416494.

Almost surely, 2^123243479424 is an apocalyptic number.

It is an amenable number.

123243479424 is an abundant number, since it is smaller than the sum of its proper divisors (268476055776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123243479424 is a wasteful number, since it uses less digits than its factorization.

123243479424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743169 (or 2743151 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 45.

The spelling of 123243479424 in words is "one hundred twenty-three billion, two hundred forty-three million, four hundred seventy-nine thousand, four hundred twenty-four".