123140928155 has 16 divisors (see below), whose sum is σ = 174326697984. Its totient is φ = 81715638240.

The previous prime is 123140928143. The next prime is 123140928173. The reversal of 123140928155 is 551829041321.

It is a de Polignac number, because none of the positive numbers 2^k-123140928155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56745887 + ... + 56748056.

It is an arithmetic number, because the mean of its divisors is an integer number (10895418624).

Almost surely, 2^123140928155 is an apocalyptic number.

123140928155 is a deficient number, since it is larger than the sum of its proper divisors (51185769829).

123140928155 is a wasteful number, since it uses less digits than its factorization.

123140928155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113493986.

The product of its (nonzero) digits is 86400, while the sum is 41.

Adding to 123140928155 its reverse (551829041321), we get a palindrome (674969969476).

The spelling of 123140928155 in words is "one hundred twenty-three billion, one hundred forty million, nine hundred twenty-eight thousand, one hundred fifty-five".