204515135451 has 18 divisors (see below), whose sum is σ = 324707686940. Its totient is φ = 123948566280.

The previous prime is 204515135389. The next prime is 204515135497. The reversal of 204515135451 is 154531515402.

204515135451 is a `hidden beast` number, since 2 + 0 + 4 + 515 + 135 + 4 + 5 + 1 = 666.

It is not a de Polignac number, because 204515135451 - 2⁹ = 204515134939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204515235451) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 93899341 + ... + 93901518.

Almost surely, 2^204515135451 is an apocalyptic number.

204515135451 is a deficient number, since it is larger than the sum of its proper divisors (120192551489).

204515135451 is a wasteful number, since it uses less digits than its factorization.

204515135451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187800887 (or 187800873 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 204515135451 in words is "two hundred four billion, five hundred fifteen million, one hundred thirty-five thousand, four hundred fifty-one".