206211502340465 has 4 divisors (see below), whose sum is σ = 247453802808564. Its totient is φ = 164969201872368.

The previous prime is 206211502340423. The next prime is 206211502340527. The reversal of 206211502340465 is 564043205112602.

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 104446744366561 + 101764757973904 = 10219919^2 + 10087852^2 .

It is a cyclic number.

It is not a de Polignac number, because 206211502340465 - 2⁴⁶ = 135842758162801 is a prime.

It is a Duffinian 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, 20621150234042 + ... + 20621150234051.

It is an arithmetic number, because the mean of its divisors is an integer number (61863450702141).

Almost surely, 2^{206211502340465} is an apocalyptic number.

It is an amenable number.

206211502340465 is a deficient number, since it is larger than the sum of its proper divisors (41242300468099).

206211502340465 is an equidigital number, since it uses as much as digits as its factorization.

206211502340465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41242300468098.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 206211502340465 in words is "two hundred six trillion, two hundred eleven billion, five hundred two million, three hundred forty thousand, four hundred sixty-five".