123165081198 has 48 divisors (see below), whose sum is σ = 280871834880. Its totient is φ = 40442254776.

The previous prime is 123165081119. The next prime is 123165081199. The reversal of 123165081198 is 891180561321.

123165081198 is a `hidden beast` number, since 1 + 23 + 1 + 6 + 508 + 119 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123165081199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1858678 + ... + 1923801.

It is an arithmetic number, because the mean of its divisors is an integer number (5851496560).

Almost surely, 2^123165081198 is an apocalyptic number.

123165081198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123165081198 is an abundant number, since it is smaller than the sum of its proper divisors (157706753682).

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

123165081198 is an equidigital number, since it uses as much as digits as its factorization.

123165081198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782563 (or 3782551 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 123165081198 in words is "one hundred twenty-three billion, one hundred sixty-five million, eighty-one thousand, one hundred ninety-eight".