123545509950 has 24 divisors (see below), whose sum is σ = 306392865048. Its totient is φ = 32945469280.

The previous prime is 123545509949. The next prime is 123545509987. The reversal of 123545509950 is 59905545321.

It is a self number, because there is not a number n which added to its sum of digits gives 123545509950.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 411818217 + ... + 411818516.

It is an arithmetic number, because the mean of its divisors is an integer number (12766369377).

Almost surely, 2^123545509950 is an apocalyptic number.

123545509950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123545509950 is an abundant number, since it is smaller than the sum of its proper divisors (182847355098).

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

123545509950 is a wasteful number, since it uses less digits than its factorization.

123545509950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823636748 (or 823636743 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 48.

The spelling of 123545509950 in words is "one hundred twenty-three billion, five hundred forty-five million, five hundred nine thousand, nine hundred fifty".