123663181807 has 48 divisors (see below), whose sum is σ = 144729604096. Its totient is φ = 105410289600.

The previous prime is 123663181757. The next prime is 123663181841. The reversal of 123663181807 is 708181366321.

It is a de Polignac number, because none of the positive numbers 2^k-123663181807 is a prime.

It is a super-2 number, since 2×123663181807² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123663181007) 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, 20481193 + ... + 20487229.

Almost surely, 2^123663181807 is an apocalyptic number.

123663181807 is a deficient number, since it is larger than the sum of its proper divisors (21066422289).

123663181807 is a wasteful number, since it uses less digits than its factorization.

123663181807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260 (or 6249 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 123663181807 in words is "one hundred twenty-three billion, six hundred sixty-three million, one hundred eighty-one thousand, eight hundred seven".