123271281617 has 4 divisors (see below), whose sum is σ = 134477761776. Its totient is φ = 112064801460.

The previous prime is 123271281611. The next prime is 123271281677. The reversal of 123271281617 is 716182172321.

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 a cyclic number.

It is not a de Polignac number, because 123271281617 - 2²⁰ = 123270233041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123271281611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5603240063 + ... + 5603240084.

It is an arithmetic number, because the mean of its divisors is an integer number (33619440444).

Almost surely, 2^123271281617 is an apocalyptic number.

It is an amenable number.

123271281617 is a deficient number, since it is larger than the sum of its proper divisors (11206480159).

123271281617 is a wasteful number, since it uses less digits than its factorization.

123271281617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11206480158.

The product of its digits is 56448, while the sum is 41.

The spelling of 123271281617 in words is "one hundred twenty-three billion, two hundred seventy-one million, two hundred eighty-one thousand, six hundred seventeen".