204551294789016 has 144 divisors (see below), whose sum is σ = 645011760907800. Its totient is φ = 58391460465408.

The previous prime is 204551294788979. The next prime is 204551294789047. The reversal of 204551294789016 is 610987492155402.

204551294789016 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 51 + 29 + 478 + 90 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 21694210 + ... + 29660433.

Almost surely, 2^{204551294789016} is an apocalyptic number.

It is an amenable number.

204551294789016 is an abundant number, since it is smaller than the sum of its proper divisors (440460466118784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204551294789016 is a wasteful number, since it uses less digits than its factorization.

204551294789016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51355798 (or 51355784 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 204551294789016 in words is "two hundred four trillion, five hundred fifty-one billion, two hundred ninety-four million, seven hundred eighty-nine thousand, sixteen".