2161256073667 has 8 divisors (see below), whose sum is σ = 2162225067296. Its totient is φ = 2160287200512.

The previous prime is 2161256073661. The next prime is 2161256073679. The reversal of 2161256073667 is 7663706521612.

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

It is a cyclic number.

It is not a de Polignac number, because 2161256073667 - 2¹⁹ = 2161255549379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161256073661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66786163 + ... + 66818515.

It is an arithmetic number, because the mean of its divisors is an integer number (270278133412).

Almost surely, 2^{2161256073667} is an apocalyptic number.

2161256073667 is a deficient number, since it is larger than the sum of its proper divisors (968993629).

2161256073667 is a wasteful number, since it uses less digits than its factorization.

2161256073667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60237.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 2161256073667 in words is "two trillion, one hundred sixty-one billion, two hundred fifty-six million, seventy-three thousand, six hundred sixty-seven".