205070620261 has 8 divisors (see below), whose sum is σ = 221625659360. Its totient is φ = 188627063472.

The previous prime is 205070620199. The next prime is 205070620277. The reversal of 205070620261 is 162026070502.

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 205070620261 - 2⁷ = 205070620133 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 (205070620291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27866751 + ... + 27874108.

It is an arithmetic number, because the mean of its divisors is an integer number (27703207420).

Almost surely, 2^205070620261 is an apocalyptic number.

It is an amenable number.

205070620261 is a deficient number, since it is larger than the sum of its proper divisors (16555039099).

205070620261 is a wasteful number, since it uses less digits than its factorization.

205070620261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55741155.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 205070620261 its reverse (162026070502), we get a palindrome (367096690763).

The spelling of 205070620261 in words is "two hundred five billion, seventy million, six hundred twenty thousand, two hundred sixty-one".