1656236235161 has 2 divisors, whose sum is σ = 1656236235162. Its totient is φ = 1656236235160.

The previous prime is 1656236235061. The next prime is 1656236235169. The reversal of 1656236235161 is 1615326326561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1415312329561 + 240923905600 = 1189669^2 + 490840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656236235161 - 2²² = 1656232040857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1656236235169) 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, 828118117580 + 828118117581.

It is an arithmetic number, because the mean of its divisors is an integer number (828118117581).

Almost surely, 2^{1656236235161} is an apocalyptic number.

It is an amenable number.

1656236235161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656236235161 is an equidigital number, since it uses as much as digits as its factorization.

1656236235161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 47.

The spelling of 1656236235161 in words is "one trillion, six hundred fifty-six billion, two hundred thirty-six million, two hundred thirty-five thousand, one hundred sixty-one".