205412645534137 has 4 divisors (see below), whose sum is σ = 205416423153396. Its totient is φ = 205408867914880.

The previous prime is 205412645534093. The next prime is 205412645534147. The reversal of 205412645534137 is 731435546214502.

It is a happy number.

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 130555212757776 + 74857432776361 = 11426076^2 + 8652019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205412645534137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205412645534147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888728064 + ... + 1888836817.

It is an arithmetic number, because the mean of its divisors is an integer number (51354105788349).

Almost surely, 2^{205412645534137} is an apocalyptic number.

It is an amenable number.

205412645534137 is a deficient number, since it is larger than the sum of its proper divisors (3777619259).

205412645534137 is an equidigital number, since it uses as much as digits as its factorization.

205412645534137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777619258.

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 205412645534137 in words is "two hundred five trillion, four hundred twelve billion, six hundred forty-five million, five hundred thirty-four thousand, one hundred thirty-seven".