206026986465457 has 32 divisors (see below), whose sum is σ = 216373903409664. Its totient is φ = 196000475865600.

The previous prime is 206026986465431. The next prime is 206026986465481. The reversal of 206026986465457 is 754564689620602.

It is a cyclic number.

It is not a de Polignac number, because 206026986465457 - 2⁷ = 206026986465329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206026986465857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238535823 + ... + 239397979.

It is an arithmetic number, because the mean of its divisors is an integer number (6761684481552).

Almost surely, 2^{206026986465457} is an apocalyptic number.

It is an amenable number.

206026986465457 is a deficient number, since it is larger than the sum of its proper divisors (10346916944207).

206026986465457 is a wasteful number, since it uses less digits than its factorization.

206026986465457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863169.

The product of its (nonzero) digits is 1045094400, while the sum is 70.

The spelling of 206026986465457 in words is "two hundred six trillion, twenty-six billion, nine hundred eighty-six million, four hundred sixty-five thousand, four hundred fifty-seven".