123667316865 has 32 divisors (see below), whose sum is σ = 221457807360. Its totient is φ = 65474462592.

The previous prime is 123667316821. The next prime is 123667316879. The reversal of 123667316865 is 568613766321.

It is not a de Polignac number, because 123667316865 - 2¹⁰ = 123667315841 is a prime.

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, 3324769 + ... + 3361758.

It is an arithmetic number, because the mean of its divisors is an integer number (6920556480).

Almost surely, 2^123667316865 is an apocalyptic number.

123667316865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123667316865 is a deficient number, since it is larger than the sum of its proper divisors (97790490495).

123667316865 is a wasteful number, since it uses less digits than its factorization.

123667316865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686678 (or 6686672 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 123667316865 in words is "one hundred twenty-three billion, six hundred sixty-seven million, three hundred sixteen thousand, eight hundred sixty-five".