123655768550605 has 32 divisors (see below), whose sum is σ = 153954996467328. Its totient is φ = 95267822112000.

The previous prime is 123655768550579. The next prime is 123655768550647. The reversal of 123655768550605 is 506055867556321.

It is not a de Polignac number, because 123655768550605 - 2¹⁵ = 123655768517837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58054510 + ... + 60146800.

It is an arithmetic number, because the mean of its divisors is an integer number (4811093639604).

Almost surely, 2^{123655768550605} is an apocalyptic number.

It is an amenable number.

123655768550605 is a deficient number, since it is larger than the sum of its proper divisors (30299227916723).

123655768550605 is a wasteful number, since it uses less digits than its factorization.

123655768550605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095597.

The product of its (nonzero) digits is 226800000, while the sum is 64.

The spelling of 123655768550605 in words is "one hundred twenty-three trillion, six hundred fifty-five billion, seven hundred sixty-eight million, five hundred fifty thousand, six hundred five".