42710111101661 has 2 divisors, whose sum is σ = 42710111101662. Its totient is φ = 42710111101660.

The previous prime is 42710111101607. The next prime is 42710111101733. The reversal of 42710111101661 is 16610111101724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35847833137636 + 6862277964025 = 5987306^2 + 2619595^2 .

It is a cyclic number.

It is not a de Polignac number, because 42710111101661 - 2⁴² = 38312064590557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42710111100661) 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 as a sum of consecutive naturals, namely, 21355055550830 + 21355055550831.

It is an arithmetic number, because the mean of its divisors is an integer number (21355055550831).

Almost surely, 2^{42710111101661} is an apocalyptic number.

It is an amenable number.

42710111101661 is a deficient number, since it is larger than the sum of its proper divisors (1).

42710111101661 is an equidigital number, since it uses as much as digits as its factorization.

42710111101661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The spelling of 42710111101661 in words is "forty-two trillion, seven hundred ten billion, one hundred eleven million, one hundred one thousand, six hundred sixty-one".