204645012634 has 4 divisors (see below), whose sum is σ = 306967518954. Its totient is φ = 102322506316.

The previous prime is 204645012581. The next prime is 204645012659. The reversal of 204645012634 is 436210546402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123479851609 + 81165161025 = 351397^2 + 284895^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204645012593 and 204645012602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51161253157 + ... + 51161253160.

Almost surely, 2^204645012634 is an apocalyptic number.

204645012634 is a deficient number, since it is larger than the sum of its proper divisors (102322506320).

204645012634 is a wasteful number, since it uses less digits than its factorization.

204645012634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102322506319.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 204645012634 in words is "two hundred four billion, six hundred forty-five million, twelve thousand, six hundred thirty-four".