123538791800 has 48 divisors (see below), whose sum is σ = 292647106440. Its totient is φ = 48483144320.

The previous prime is 123538791781. The next prime is 123538791811. The reversal of 123538791800 is 8197835321.

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, 5816702 + ... + 5837901.

Almost surely, 2^123538791800 is an apocalyptic number.

123538791800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123538791800 is an abundant number, since it is smaller than the sum of its proper divisors (169108314640).

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

123538791800 is a wasteful number, since it uses less digits than its factorization.

123538791800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11654672 (or 11654663 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 123538791800 in words is "one hundred twenty-three billion, five hundred thirty-eight million, seven hundred ninety-one thousand, eight hundred".