255545137212 has 12 divisors (see below), whose sum is σ = 596271986856. Its totient is φ = 85181712400.

The previous prime is 255545137171. The next prime is 255545137219. The reversal of 255545137212 is 212731545552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255545137219) 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, 10647714039 + ... + 10647714062.

It is an arithmetic number, because the mean of its divisors is an integer number (49689332238).

Almost surely, 2^255545137212 is an apocalyptic number.

It is an amenable number.

255545137212 is an abundant number, since it is smaller than the sum of its proper divisors (340726849644).

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

255545137212 is a wasteful number, since it uses less digits than its factorization.

255545137212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21295428108 (or 21295428106 counting only the distinct ones).

The product of its digits is 420000, while the sum is 42.

The spelling of 255545137212 in words is "two hundred fifty-five billion, five hundred forty-five million, one hundred thirty-seven thousand, two hundred twelve".