205612400106631 has 8 divisors (see below), whose sum is σ = 235070956337184. Its totient is φ = 176175182929920.

The previous prime is 205612400106577. The next prime is 205612400106691. The reversal of 205612400106631 is 136601004216502.

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 205612400106631 - 2¹⁷ = 205612399975559 is a prime.

It is a super-2 number, since 2×205612400106631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205612400106691) 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, 5334742810 + ... + 5334781351.

It is an arithmetic number, because the mean of its divisors is an integer number (29383869542148).

Almost surely, 2^{205612400106631} is an apocalyptic number.

205612400106631 is a deficient number, since it is larger than the sum of its proper divisors (29458556230553).

205612400106631 is a wasteful number, since it uses less digits than its factorization.

205612400106631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10669526921.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 205612400106631 in words is "two hundred five trillion, six hundred twelve billion, four hundred million, one hundred six thousand, six hundred thirty-one".