123641261897808 has 160 divisors (see below), whose sum is σ = 324855004948992. Its totient is φ = 40513366080000.

The previous prime is 123641261897789. The next prime is 123641261897843. The reversal of 123641261897808 is 808798162146321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6701050983 + ... + 6701069433.

Almost surely, 2^{123641261897808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123641261897808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162427502474496).

123641261897808 is an abundant number, since it is smaller than the sum of its proper divisors (201213743051184).

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

123641261897808 is a wasteful number, since it uses less digits than its factorization.

123641261897808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22793 (or 22787 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 66.

The spelling of 123641261897808 in words is "one hundred twenty-three trillion, six hundred forty-one billion, two hundred sixty-one million, eight hundred ninety-seven thousand, eight hundred eight".