123785120500 has 24 divisors (see below), whose sum is σ = 270346704264. Its totient is φ = 49514048000.

The previous prime is 123785120497. The next prime is 123785120513. The reversal of 123785120500 is 5021587321.

It can be written as a sum of positive squares in 4 ways, for example, as 7341747856 + 116443372644 = 85684^2 + 341238^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123784621 + ... + 123785620.

It is an arithmetic number, because the mean of its divisors is an integer number (11264446011).

Almost surely, 2^123785120500 is an apocalyptic number.

123785120500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123785120500 is an abundant number, since it is smaller than the sum of its proper divisors (146561583764).

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

123785120500 is a wasteful number, since it uses less digits than its factorization.

123785120500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247570260 (or 247570248 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 123785120500 in words is "one hundred twenty-three billion, seven hundred eighty-five million, one hundred twenty thousand, five hundred".