123544639141 has 16 divisors (see below), whose sum is σ = 156139682688. Its totient is φ = 94949798400.

The previous prime is 123544639129. The next prime is 123544639181. The reversal of 123544639141 is 141936445321.

It is a cyclic number.

It is not a de Polignac number, because 123544639141 - 2¹¹ = 123544637093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123544639181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10983940 + ... + 10995181.

It is an arithmetic number, because the mean of its divisors is an integer number (9758730168).

Almost surely, 2^123544639141 is an apocalyptic number.

123544639141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123544639141 is a deficient number, since it is larger than the sum of its proper divisors (32595043547).

123544639141 is a wasteful number, since it uses less digits than its factorization.

123544639141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21979212.

The product of its digits is 311040, while the sum is 43.

The spelling of 123544639141 in words is "one hundred twenty-three billion, five hundred forty-four million, six hundred thirty-nine thousand, one hundred forty-one".