205148159999 has 4 divisors (see below), whose sum is σ = 207030253320. Its totient is φ = 203266066680.

The previous prime is 205148159989. The next prime is 205148160017. The reversal of 205148159999 is 999951841502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205148159999 - 2⁸ = 205148159743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205148159939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941046497 + ... + 941046714.

It is an arithmetic number, because the mean of its divisors is an integer number (51757563330).

Almost surely, 2^205148159999 is an apocalyptic number.

205148159999 is a deficient number, since it is larger than the sum of its proper divisors (1882093321).

205148159999 is a wasteful number, since it uses less digits than its factorization.

205148159999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882093320.

The product of its (nonzero) digits is 10497600, while the sum is 62.

The spelling of 205148159999 in words is "two hundred five billion, one hundred forty-eight million, one hundred fifty-nine thousand, nine hundred ninety-nine".