123742278717 has 8 divisors (see below), whose sum is σ = 164995291296. Its totient is φ = 82492059312.

The previous prime is 123742278701. The next prime is 123742278721. The reversal of 123742278717 is 717872247321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123742278717 - 2⁴ = 123742278701 is a prime.

It is a super-2 number, since 2×123742278717² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123742278717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123742278917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592638 + ... + 773759.

It is an arithmetic number, because the mean of its divisors is an integer number (20624411412).

Almost surely, 2^123742278717 is an apocalyptic number.

It is an amenable number.

123742278717 is a deficient number, since it is larger than the sum of its proper divisors (41253012579).

123742278717 is a wasteful number, since it uses less digits than its factorization.

123742278717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396587.

The product of its digits is 1843968, while the sum is 51.

The spelling of 123742278717 in words is "one hundred twenty-three billion, seven hundred forty-two million, two hundred seventy-eight thousand, seven hundred seventeen".