205740926113 has 8 divisors (see below), whose sum is σ = 206142010632. Its totient is φ = 205340061696.

The previous prime is 205740926107. The next prime is 205740926117. The reversal of 205740926113 is 311629047502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52290883584 + 153450042529 = 228672^2 + 391727^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205740926113 - 2⁹ = 205740925601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205740926117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882381 + ... + 1988677.

It is an arithmetic number, because the mean of its divisors is an integer number (25767751329).

Almost surely, 2^205740926113 is an apocalyptic number.

It is an amenable number.

205740926113 is a deficient number, since it is larger than the sum of its proper divisors (401084519).

205740926113 is a wasteful number, since it uses less digits than its factorization.

205740926113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110051.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 205740926113 in words is "two hundred five billion, seven hundred forty million, nine hundred twenty-six thousand, one hundred thirteen".