206554653245 has 4 divisors (see below), whose sum is σ = 247865583900. Its totient is φ = 165243722592.

The previous prime is 206554653233. The next prime is 206554653259. The reversal of 206554653245 is 542356455602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83245521529 + 123309131716 = 288523^2 + 351154^2 .

It is a cyclic number.

It is not a de Polignac number, because 206554653245 - 2²² = 206550458941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206554653245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20655465320 + ... + 20655465329.

It is an arithmetic number, because the mean of its divisors is an integer number (61966395975).

Almost surely, 2^206554653245 is an apocalyptic number.

It is an amenable number.

206554653245 is a deficient number, since it is larger than the sum of its proper divisors (41310930655).

206554653245 is an equidigital number, since it uses as much as digits as its factorization.

206554653245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41310930654.

The product of its (nonzero) digits is 4320000, while the sum is 47.

The spelling of 206554653245 in words is "two hundred six billion, five hundred fifty-four million, six hundred fifty-three thousand, two hundred forty-five".