65646646161123 has 16 divisors (see below), whose sum is σ = 90820520247296. Its totient is φ = 42133231019520.

The previous prime is 65646646161077. The next prime is 65646646161143. The reversal of 65646646161123 is 32116164664656.

It is not a de Polignac number, because 65646646161123 - 2²⁹ = 65646109290211 is a prime.

It is a super-2 number, since 2×65646646161123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65646646161143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828681315 + ... + 1828717212.

It is an arithmetic number, because the mean of its divisors is an integer number (5676282515456).

Almost surely, 2^{65646646161123} is an apocalyptic number.

65646646161123 is a deficient number, since it is larger than the sum of its proper divisors (25173874086173).

65646646161123 is a wasteful number, since it uses less digits than its factorization.

65646646161123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657398754.

The product of its digits is 22394880, while the sum is 57.

The spelling of 65646646161123 in words is "sixty-five trillion, six hundred forty-six billion, six hundred forty-six million, one hundred sixty-one thousand, one hundred twenty-three".