123546812500 has 42 divisors (see below), whose sum is σ = 270255329750. Its totient is φ = 49418700000.

The previous prime is 123546812491. The next prime is 123546812533. The reversal of 123546812500 is 5218645321.

It can be written as a sum of positive squares in 7 ways, for example, as 105778455696 + 17768356804 = 325236^2 + 133298^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123546812500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 925875 + ... + 1050874.

Almost surely, 2^123546812500 is an apocalyptic number.

123546812500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123546812500 is an abundant number, since it is smaller than the sum of its proper divisors (146708517250).

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

123546812500 is an frugal number, since it uses more digits than its factorization.

123546812500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976783 (or 1976756 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 123546812500 in words is "one hundred twenty-three billion, five hundred forty-six million, eight hundred twelve thousand, five hundred".