123766423440 has 80 divisors (see below), whose sum is σ = 418555550016. Its totient is φ = 30003980800.

The previous prime is 123766423411. The next prime is 123766423471. The reversal of 123766423440 is 44324667321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×123766423440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123766423392 and 123766423401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23437971 + ... + 23443250.

Almost surely, 2^123766423440 is an apocalyptic number.

123766423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123766423440 is an abundant number, since it is smaller than the sum of its proper divisors (294789126576).

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

123766423440 is a wasteful number, since it uses less digits than its factorization.

123766423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46881248 (or 46881242 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 42.

The spelling of 123766423440 in words is "one hundred twenty-three billion, seven hundred sixty-six million, four hundred twenty-three thousand, four hundred forty".