2161560401267 has 2 divisors, whose sum is σ = 2161560401268. Its totient is φ = 2161560401266.

The previous prime is 2161560401251. The next prime is 2161560401281. The reversal of 2161560401267 is 7621040651612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161560401267 - 2⁴ = 2161560401251 is a prime.

It is not a weakly prime, because it can be changed into another prime (2161560401867) 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 as a sum of consecutive naturals, namely, 1080780200633 + 1080780200634.

It is an arithmetic number, because the mean of its divisors is an integer number (1080780200634).

Almost surely, 2^{2161560401267} is an apocalyptic number.

2161560401267 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161560401267 is an equidigital number, since it uses as much as digits as its factorization.

2161560401267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 2161560401267 in words is "two trillion, one hundred sixty-one billion, five hundred sixty million, four hundred one thousand, two hundred sixty-seven".