123125155155 has 48 divisors (see below), whose sum is σ = 217504478880. Its totient is φ = 64409739264.

The previous prime is 123125155147. The next prime is 123125155163. The reversal of 123125155155 is 551551521321.

123125155155 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 2 + 51 + 551 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (123125155147) and next prime (123125155163).

It is not a de Polignac number, because 123125155155 - 2³ = 123125155147 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15567712 + ... + 15575618.

It is an arithmetic number, because the mean of its divisors is an integer number (4531343310).

Almost surely, 2^123125155155 is an apocalyptic number.

123125155155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123125155155 is a deficient number, since it is larger than the sum of its proper divisors (94379323725).

123125155155 is a wasteful number, since it uses less digits than its factorization.

123125155155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14500 (or 14497 counting only the distinct ones).

The product of its digits is 37500, while the sum is 36.

Adding to 123125155155 its reverse (551551521321), we get a palindrome (674676676476).

The spelling of 123125155155 in words is "one hundred twenty-three billion, one hundred twenty-five million, one hundred fifty-five thousand, one hundred fifty-five".