205156436026 has 8 divisors (see below), whose sum is σ = 307738525140. Its totient is φ = 102576927648.

The previous prime is 205156435963. The next prime is 205156436041. The reversal of 205156436026 is 620634651502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 189399910401 + 15756525625 = 435201^2 + 125525^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 205156436026.

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, 432411 + ... + 772846.

Almost surely, 2^205156436026 is an apocalyptic number.

205156436026 is a deficient number, since it is larger than the sum of its proper divisors (102582089114).

205156436026 is a wasteful number, since it uses less digits than its factorization.

205156436026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290368.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 205156436026 in words is "two hundred five billion, one hundred fifty-six million, four hundred thirty-six thousand, twenty-six".