205162113491 has 2 divisors, whose sum is σ = 205162113492. Its totient is φ = 205162113490.

The previous prime is 205162113461. The next prime is 205162113547. The reversal of 205162113491 is 194311261502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205162113491 - 2³⁰ = 204088371667 is a prime.

It is not a weakly prime, because it can be changed into another prime (205162113461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102581056745 + 102581056746.

It is an arithmetic number, because the mean of its divisors is an integer number (102581056746).

Almost surely, 2^205162113491 is an apocalyptic number.

205162113491 is a deficient number, since it is larger than the sum of its proper divisors (1).

205162113491 is an equidigital number, since it uses as much as digits as its factorization.

205162113491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

Adding to 205162113491 its reverse (194311261502), we get a palindrome (399473374993).

The spelling of 205162113491 in words is "two hundred five billion, one hundred sixty-two million, one hundred thirteen thousand, four hundred ninety-one".