2011656120173 has 16 divisors (see below), whose sum is σ = 2364502162560. Its totient is φ = 1675308194496.

The previous prime is 2011656120143. The next prime is 2011656120181. The reversal of 2011656120173 is 3710216561102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2011656120173 - 2²⁴ = 2011639342957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011656120143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5293811 + ... + 5661072.

It is an arithmetic number, because the mean of its divisors is an integer number (147781385160).

Almost surely, 2^{2011656120173} is an apocalyptic number.

It is an amenable number.

2011656120173 is a deficient number, since it is larger than the sum of its proper divisors (352846042387).

2011656120173 is a wasteful number, since it uses less digits than its factorization.

2011656120173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10955636.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 2011656120173 in words is "two trillion, eleven billion, six hundred fifty-six million, one hundred twenty thousand, one hundred seventy-three".