2135614661 has 2 divisors, whose sum is σ = 2135614662. Its totient is φ = 2135614660.

The previous prime is 2135614639. The next prime is 2135614667. The reversal of 2135614661 is 1664165312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1839981025 + 295633636 = 42895^2 + 17194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135614661 - 2¹⁰ = 2135613637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135614667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067807330 + 1067807331.

It is an arithmetic number, because the mean of its divisors is an integer number (1067807331).

Almost surely, 2^2135614661 is an apocalyptic number.

It is an amenable number.

2135614661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135614661 is an equidigital number, since it uses as much as digits as its factorization.

2135614661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 2135614661 is about 46212.7110327884. The cubic root of 2135614661 is about 1287.7778905114. Note that the first 3 decimals are identical.

Adding to 2135614661 its reverse (1664165312), we get a palindrome (3799779973).

The spelling of 2135614661 in words is "two billion, one hundred thirty-five million, six hundred fourteen thousand, six hundred sixty-one".