201255556560 has 40 divisors (see below), whose sum is σ = 623892226080. Its totient is φ = 53668148352.

The previous prime is 201255556553. The next prime is 201255556561. The reversal of 201255556560 is 65655552102.

201255556560 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201255556561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419282170 + ... + 419282649.

It is an arithmetic number, because the mean of its divisors is an integer number (15597305652).

Almost surely, 2^201255556560 is an apocalyptic number.

201255556560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201255556560 is an abundant number, since it is smaller than the sum of its proper divisors (422636669520).

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

201255556560 is a wasteful number, since it uses less digits than its factorization.

201255556560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838564835 (or 838564829 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 201255556560 in words is "two hundred one billion, two hundred fifty-five million, five hundred fifty-six thousand, five hundred sixty".