55161666116656 has 160 divisors (see below), whose sum is σ = 119147950382400. Its totient is φ = 24530137251840.

The previous prime is 55161666116597. The next prime is 55161666116657. The reversal of 55161666116656 is 65661166616155.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55161666116594 and 55161666116603.

It is not an unprimeable number, because it can be changed into a prime (55161666116657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 791414800 + ... + 791484496.

It is an arithmetic number, because the mean of its divisors is an integer number (744674689890).

Almost surely, 2^{55161666116656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55161666116656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59573975191200).

55161666116656 is an abundant number, since it is smaller than the sum of its proper divisors (63986284265744).

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

55161666116656 is a wasteful number, since it uses less digits than its factorization.

55161666116656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70287 (or 70281 counting only the distinct ones).

The product of its digits is 34992000, while the sum is 61.

The spelling of 55161666116656 in words is "fifty-five trillion, one hundred sixty-one billion, six hundred sixty-six million, one hundred sixteen thousand, six hundred fifty-six".