123187198038 has 8 divisors (see below), whose sum is σ = 246374396088. Its totient is φ = 41062399344.

The previous prime is 123187198021. The next prime is 123187198051. The reversal of 123187198038 is 830891781321.

It is a sphenic number, since it is the product of 3 distinct primes.

123187198038 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10265599831 + ... + 10265599842.

It is an arithmetic number, because the mean of its divisors is an integer number (30796799511).

Almost surely, 2^123187198038 is an apocalyptic number.

123187198038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

123187198038 is a wasteful number, since it uses less digits than its factorization.

123187198038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20531199678.

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 123187198038 in words is "one hundred twenty-three billion, one hundred eighty-seven million, one hundred ninety-eight thousand, thirty-eight".