205865424149 has 8 divisors (see below), whose sum is σ = 256663386048. Its totient is φ = 160414616160.

The previous prime is 205865424139. The next prime is 205865424239. The reversal of 205865424149 is 941424568502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205865424149 - 2³² = 201570456853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205865424097 and 205865424106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205865424139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336788392 + ... + 1336788545.

It is an arithmetic number, because the mean of its divisors is an integer number (32082923256).

Almost surely, 2^205865424149 is an apocalyptic number.

It is an amenable number.

205865424149 is a deficient number, since it is larger than the sum of its proper divisors (50797961899).

205865424149 is a wasteful number, since it uses less digits than its factorization.

205865424149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673576955.

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 205865424149 in words is "two hundred five billion, eight hundred sixty-five million, four hundred twenty-four thousand, one hundred forty-nine".