123243963550 has 24 divisors (see below), whose sum is σ = 229272999696. Its totient is φ = 49289149440.

The previous prime is 123243963517. The next prime is 123243963611. The reversal of 123243963550 is 55369342321.

It is a happy number.

It is a super-3 number, since 3×123243963550³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123243963497 and 123243963506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88414 + ... + 504286.

It is an arithmetic number, because the mean of its divisors is an integer number (9553041654).

Almost surely, 2^123243963550 is an apocalyptic number.

123243963550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123243963550 is a deficient number, since it is larger than the sum of its proper divisors (106029036146).

123243963550 is a wasteful number, since it uses less digits than its factorization.

123243963550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421812 (or 421807 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 43.

The spelling of 123243963550 in words is "one hundred twenty-three billion, two hundred forty-three million, nine hundred sixty-three thousand, five hundred fifty".