123664116015 has 64 divisors (see below), whose sum is σ = 252456307200. Its totient is φ = 56802643200.

The previous prime is 123664116013. The next prime is 123664116097. The reversal of 123664116015 is 510611466321.

123664116015 is a `hidden beast` number, since 1 + 2 + 3 + 6 + 6 + 41 + 1 + 601 + 5 = 666.

It is not a de Polignac number, because 123664116015 - 2¹ = 123664116013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123664116013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2163246 + ... + 2219675.

It is an arithmetic number, because the mean of its divisors is an integer number (3944629800).

Almost surely, 2^123664116015 is an apocalyptic number.

123664116015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123664116015 is an abundant number, since it is smaller than the sum of its proper divisors (128792191185).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123664116015 is a wasteful number, since it uses less digits than its factorization.

123664116015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382965 (or 4382959 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 123664116015 in words is "one hundred twenty-three billion, six hundred sixty-four million, one hundred sixteen thousand, fifteen".