206512611712655 has 8 divisors (see below), whose sum is σ = 247816633406784. Its totient is φ = 165209089802400.

The previous prime is 206512611712597. The next prime is 206512611712657. The reversal of 206512611712655 is 556217116215602.

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

It is not a de Polignac number, because 206512611712655 - 2⁸ = 206512611712399 is a prime.

It is a super-2 number, since 2×206512611712655² (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 (206512611712657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124036316 + ... + 125690225.

It is an arithmetic number, because the mean of its divisors is an integer number (30977079175848).

Almost surely, 2^{206512611712655} is an apocalyptic number.

206512611712655 is a deficient number, since it is larger than the sum of its proper divisors (41304021694129).

206512611712655 is a wasteful number, since it uses less digits than its factorization.

206512611712655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249891937.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 206512611712655 in words is "two hundred six trillion, five hundred twelve billion, six hundred eleven million, seven hundred twelve thousand, six hundred fifty-five".