206741177345 has 4 divisors (see below), whose sum is σ = 248089412820. Its totient is φ = 165392941872.

The previous prime is 206741177327. The next prime is 206741177407. The reversal of 206741177345 is 543771147602.

It is a Cunningham number, because it is equal to 454688²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543771147602 = 2 ⋅271885573801.

It can be written as a sum of positive squares in 2 ways, for example, as 74426387344 + 132314790001 = 272812^2 + 363751^2 .

It is a cyclic number.

It is not a de Polignac number, because 206741177345 - 2⁸ = 206741177089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206741177345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20674117730 + ... + 20674117739.

It is an arithmetic number, because the mean of its divisors is an integer number (62022353205).

Almost surely, 2^206741177345 is an apocalyptic number.

It is an amenable number.

206741177345 is a deficient number, since it is larger than the sum of its proper divisors (41348235475).

206741177345 is an equidigital number, since it uses as much as digits as its factorization.

206741177345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41348235474.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 206741177345 in words is "two hundred six billion, seven hundred forty-one million, one hundred seventy-seven thousand, three hundred forty-five".