205504625240 has 16 divisors (see below), whose sum is σ = 462385406880. Its totient is φ = 82201850080.

The previous prime is 205504625231. The next prime is 205504625243. The reversal of 205504625240 is 42526405502.

It is a self number, because there is not a number n which added to its sum of digits gives 205504625240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205504625243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568807776 + ... + 2568807855.

It is an arithmetic number, because the mean of its divisors is an integer number (28899087930).

Almost surely, 2^205504625240 is an apocalyptic number.

205504625240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205504625240 is an abundant number, since it is smaller than the sum of its proper divisors (256880781640).

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

205504625240 is a wasteful number, since it uses less digits than its factorization.

205504625240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137615642 (or 5137615638 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 205504625240 in words is "two hundred five billion, five hundred four million, six hundred twenty-five thousand, two hundred forty".