206273967551 has 16 divisors (see below), whose sum is σ = 207800200608. Its totient is φ = 204755126400.

The previous prime is 206273967547. The next prime is 206273967593. The reversal of 206273967551 is 155769372602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 206273967551 - 2² = 206273967547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206273967493 and 206273967502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206273967521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104547401 + ... + 104549373.

It is an arithmetic number, because the mean of its divisors is an integer number (12987512538).

Almost surely, 2^206273967551 is an apocalyptic number.

206273967551 is a deficient number, since it is larger than the sum of its proper divisors (1526233057).

206273967551 is a wasteful number, since it uses less digits than its factorization.

206273967551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482.

The product of its (nonzero) digits is 4762800, while the sum is 53.

The spelling of 206273967551 in words is "two hundred six billion, two hundred seventy-three million, nine hundred sixty-seven thousand, five hundred fifty-one".