204745435557 has 96 divisors (see below), whose sum is σ = 319949118720. Its totient is φ = 116053217280.

The previous prime is 204745435523. The next prime is 204745435579. The reversal of 204745435557 is 755534547402.

It is not a de Polignac number, because 204745435557 - 2¹² = 204745431461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204745435157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 200533707 + ... + 200534727.

It is an arithmetic number, because the mean of its divisors is an integer number (3332803320).

Almost surely, 2^204745435557 is an apocalyptic number.

It is an amenable number.

204745435557 is a deficient number, since it is larger than the sum of its proper divisors (115203683163).

204745435557 is a wasteful number, since it uses less digits than its factorization.

204745435557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 11760000, while the sum is 51.

The spelling of 204745435557 in words is "two hundred four billion, seven hundred forty-five million, four hundred thirty-five thousand, five hundred fifty-seven".