206105653523 has 12 divisors (see below), whose sum is σ = 261551516472. Its totient is φ = 160601807520.

The previous prime is 206105653513. The next prime is 206105653531. The reversal of 206105653523 is 325356501602.

It is not a de Polignac number, because 206105653523 - 2⁶ = 206105653459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206105653513) 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 11 ways as a sum of consecutive naturals, for example, 191192090 + ... + 191193167.

It is an arithmetic number, because the mean of its divisors is an integer number (21795959706).

Almost surely, 2^206105653523 is an apocalyptic number.

206105653523 is a deficient number, since it is larger than the sum of its proper divisors (55445862949).

206105653523 is a wasteful number, since it uses less digits than its factorization.

206105653523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382385282 (or 382385275 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 206105653523 in words is "two hundred six billion, one hundred five million, six hundred fifty-three thousand, five hundred twenty-three".