123663367687851 has 48 divisors (see below), whose sum is σ = 180326284739328. Its totient is φ = 81660387556800.

The previous prime is 123663367687813. The next prime is 123663367687879. The reversal of 123663367687851 is 158786763366321.

123663367687851 is a `hidden beast` number, since 1 + 2 + 36 + 63 + 367 + 68 + 78 + 51 = 666.

It is not a de Polignac number, because 123663367687851 - 2¹⁰ = 123663367686827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123663367687851.

It is not an unprimeable number, because it can be changed into a prime (123663367687051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2074476036 + ... + 2074535646.

It is an arithmetic number, because the mean of its divisors is an integer number (3756797598736).

Almost surely, 2^{123663367687851} is an apocalyptic number.

123663367687851 is a deficient number, since it is larger than the sum of its proper divisors (56662917051477).

123663367687851 is a wasteful number, since it uses less digits than its factorization.

123663367687851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64352 (or 64349 counting only the distinct ones).

The product of its digits is 1097349120, while the sum is 72.

The spelling of 123663367687851 in words is "one hundred twenty-three trillion, six hundred sixty-three billion, three hundred sixty-seven million, six hundred eighty-seven thousand, eight hundred fifty-one".