204545145501 has 24 divisors (see below), whose sum is σ = 295806944160. Its totient is φ = 136200691296.

The previous prime is 204545145499. The next prime is 204545145517. The reversal of 204545145501 is 105541545402.

204545145501 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 4 + 5 + 145 + 501 = 666.

It is not a de Polignac number, because 204545145501 - 2¹ = 204545145499 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204545146501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47755306 + ... + 47759588.

It is an arithmetic number, because the mean of its divisors is an integer number (12325289340).

Almost surely, 2^204545145501 is an apocalyptic number.

It is an amenable number.

204545145501 is a deficient number, since it is larger than the sum of its proper divisors (91261798659).

204545145501 is a wasteful number, since it uses less digits than its factorization.

204545145501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385 (or 9382 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 204545145501 in words is "two hundred four billion, five hundred forty-five million, one hundred forty-five thousand, five hundred one".