204978270040 has 16 divisors (see below), whose sum is σ = 461201107680. Its totient is φ = 81991308000.

The previous prime is 204978270017. The next prime is 204978270073. The reversal of 204978270040 is 40072879402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562228336 + ... + 2562228415.

It is an arithmetic number, because the mean of its divisors is an integer number (28825069230).

Almost surely, 2^204978270040 is an apocalyptic number.

204978270040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204978270040 is an abundant number, since it is smaller than the sum of its proper divisors (256222837640).

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

204978270040 is a wasteful number, since it uses less digits than its factorization.

204978270040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5124456762 (or 5124456758 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 204978270040 in words is "two hundred four billion, nine hundred seventy-eight million, two hundred seventy thousand, forty".