15616661605117 has 8 divisors (see below), whose sum is σ = 16297747303680. Its totient is φ = 14935750940880.

The previous prime is 15616661605007. The next prime is 15616661605169. The reversal of 15616661605117 is 71150616661651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15616661605117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15616661609117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43576234 + ... + 43933147.

It is an arithmetic number, because the mean of its divisors is an integer number (2037218412960).

Almost surely, 2^{15616661605117} is an apocalyptic number.

It is an amenable number.

15616661605117 is a deficient number, since it is larger than the sum of its proper divisors (681085698563).

15616661605117 is an equidigital number, since it uses as much as digits as its factorization.

15616661605117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87517163.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 15616661605117 in words is "fifteen trillion, six hundred sixteen billion, six hundred sixty-one million, six hundred five thousand, one hundred seventeen".