206212449639 has 32 divisors (see below), whose sum is σ = 316263792640. Its totient is φ = 117072944352.

The previous prime is 206212449631. The next prime is 206212449643. The reversal of 206212449639 is 936944212602.

It is not a de Polignac number, because 206212449639 - 2³ = 206212449631 is a prime.

It is a super-2 number, since 2×206212449639² (a number of 23 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 (206212449631) 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, 12173994 + ... + 12190920.

It is an arithmetic number, because the mean of its divisors is an integer number (9883243520).

Almost surely, 2^206212449639 is an apocalyptic number.

206212449639 is a deficient number, since it is larger than the sum of its proper divisors (110051343001).

206212449639 is a wasteful number, since it uses less digits than its factorization.

206212449639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20659.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 206212449639 in words is "two hundred six billion, two hundred twelve million, four hundred forty-nine thousand, six hundred thirty-nine".