2140411661 has 2 divisors, whose sum is σ = 2140411662. Its totient is φ = 2140411660.

The previous prime is 2140411649. The next prime is 2140411687. The reversal of 2140411661 is 1661140412.

It is an a-pointer prime, because the next prime (2140411687) can be obtained adding 2140411661 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2046205225 + 94206436 = 45235^2 + 9706^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140411661 - 2⁶ = 2140411597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2140411661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2140411621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070205830 + 1070205831.

It is an arithmetic number, because the mean of its divisors is an integer number (1070205831).

Almost surely, 2^2140411661 is an apocalyptic number.

It is an amenable number.

2140411661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140411661 is an equidigital number, since it uses as much as digits as its factorization.

2140411661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2140411661 is about 46264.5832251843. The cubic root of 2140411661 is about 1288.7413681705.

The spelling of 2140411661 in words is "two billion, one hundred forty million, four hundred eleven thousand, six hundred sixty-one".