123881511076149 has 4 divisors (see below), whose sum is σ = 165175348101536. Its totient is φ = 82587674050764.

The previous prime is 123881511076117. The next prime is 123881511076163. The reversal of 123881511076149 is 941670115188321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123881511076149 - 2⁵ = 123881511076117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123881511076049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20646918512689 + ... + 20646918512694.

It is an arithmetic number, because the mean of its divisors is an integer number (41293837025384).

It is a 2-persistent number, because it is pandigital, and so is 2⋅123881511076149 = 247763022152298, but 3⋅123881511076149 = 371644533228447 is not.

Almost surely, 2^{123881511076149} is an apocalyptic number.

It is an amenable number.

123881511076149 is a deficient number, since it is larger than the sum of its proper divisors (41293837025387).

123881511076149 is an equidigital number, since it uses as much as digits as its factorization.

123881511076149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41293837025386.

The product of its (nonzero) digits is 2903040, while the sum is 57.

The spelling of 123881511076149 in words is "one hundred twenty-three trillion, eight hundred eighty-one billion, five hundred eleven million, seventy-six thousand, one hundred forty-nine".