123257820168 has 48 divisors (see below), whose sum is σ = 381512302080. Its totient is φ = 35216519904.

The previous prime is 123257820143. The next prime is 123257820193. The reversal of 123257820168 is 861028752321.

123257820168 is a `hidden beast` number, since 12 + 3 + 2 + 578 + 2 + 0 + 1 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (123257820143) and next prime (123257820193).

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, 122279080 + ... + 122280087.

It is an arithmetic number, because the mean of its divisors is an integer number (7948172960).

Almost surely, 2^123257820168 is an apocalyptic number.

123257820168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

123257820168 is an abundant number, since it is smaller than the sum of its proper divisors (258254481912).

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

123257820168 is a wasteful number, since it uses less digits than its factorization.

123257820168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244559186 (or 244559179 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 123257820168 in words is "one hundred twenty-three billion, two hundred fifty-seven million, eight hundred twenty thousand, one hundred sixty-eight".