2161651606055 has 8 divisors (see below), whose sum is σ = 2595044613744. Its totient is φ = 1728612827200.

The previous prime is 2161651606033. The next prime is 2161651606063. The reversal of 2161651606055 is 5506061561612.

It is a happy number.

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

It is not a de Polignac number, because 2161651606055 - 2⁴⁰ = 1062139978279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161651605997 and 2161651606015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88543781 + ... + 88568190.

It is an arithmetic number, because the mean of its divisors is an integer number (324380576718).

Almost surely, 2^{2161651606055} is an apocalyptic number.

2161651606055 is a deficient number, since it is larger than the sum of its proper divisors (433393007689).

2161651606055 is a wasteful number, since it uses less digits than its factorization.

2161651606055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177114417.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 2161651606055 in words is "two trillion, one hundred sixty-one billion, six hundred fifty-one million, six hundred six thousand, fifty-five".