211613140649 has 2 divisors, whose sum is σ = 211613140650. Its totient is φ = 211613140648.

The previous prime is 211613140639. The next prime is 211613140667. The reversal of 211613140649 is 946041316112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202482000400 + 9131140249 = 449980^2 + 95557^2 .

It is a cyclic number.

It is not a de Polignac number, because 211613140649 - 2⁸ = 211613140393 is a prime.

It is a super-2 number, since 2×211613140649² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211613140639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105806570324 + 105806570325.

It is an arithmetic number, because the mean of its divisors is an integer number (105806570325).

Almost surely, 2^211613140649 is an apocalyptic number.

It is an amenable number.

211613140649 is a deficient number, since it is larger than the sum of its proper divisors (1).

211613140649 is an equidigital number, since it uses as much as digits as its factorization.

211613140649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 211613140649 in words is "two hundred eleven billion, six hundred thirteen million, one hundred forty thousand, six hundred forty-nine".