205142712899 has 2 divisors, whose sum is σ = 205142712900. Its totient is φ = 205142712898.

The previous prime is 205142712893. The next prime is 205142712917. The reversal of 205142712899 is 998217241502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205142712899 is a prime.

It is not a weakly prime, because it can be changed into another prime (205142712893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102571356449 + 102571356450.

It is an arithmetic number, because the mean of its divisors is an integer number (102571356450).

Almost surely, 2^205142712899 is an apocalyptic number.

205142712899 is a deficient number, since it is larger than the sum of its proper divisors (1).

205142712899 is an equidigital number, since it uses as much as digits as its factorization.

205142712899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 205142712899 in words is "two hundred five billion, one hundred forty-two million, seven hundred twelve thousand, eight hundred ninety-nine".