206153020320245 has 4 divisors (see below), whose sum is σ = 247383624384300. Its totient is φ = 164922416256192.

The previous prime is 206153020320209. The next prime is 206153020320281. The reversal of 206153020320245 is 542023020351602.

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

It is an interprime number because it is at equal distance from previous prime (206153020320209) and next prime (206153020320281).

It can be written as a sum of positive squares in 2 ways, for example, as 145596126607684 + 60556893712561 = 12066322^2 + 7781831^2 .

It is a cyclic number.

It is not a de Polignac number, because 206153020320245 - 2¹⁴ = 206153020303861 is a prime.

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, 20615302032020 + ... + 20615302032029.

It is an arithmetic number, because the mean of its divisors is an integer number (61845906096075).

Almost surely, 2^{206153020320245} is an apocalyptic number.

It is an amenable number.

206153020320245 is a deficient number, since it is larger than the sum of its proper divisors (41230604064055).

206153020320245 is an equidigital number, since it uses as much as digits as its factorization.

206153020320245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41230604064054.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 206153020320245 its reverse (542023020351602), we get a palindrome (748176040671847).

The spelling of 206153020320245 in words is "two hundred six trillion, one hundred fifty-three billion, twenty million, three hundred twenty thousand, two hundred forty-five".