255665987652 has 12 divisors (see below), whose sum is σ = 596553971216. Its totient is φ = 85221995880.

The previous prime is 255665987611. The next prime is 255665987719. The reversal of 255665987652 is 256789566552.

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

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, 10652749474 + ... + 10652749497.

Almost surely, 2^255665987652 is an apocalyptic number.

It is an amenable number.

255665987652 is an abundant number, since it is smaller than the sum of its proper divisors (340887983564).

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

255665987652 is a wasteful number, since it uses less digits than its factorization.

255665987652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21305498978 (or 21305498976 counting only the distinct ones).

The product of its digits is 272160000, while the sum is 66.

The spelling of 255665987652 in words is "two hundred fifty-five billion, six hundred sixty-five million, nine hundred eighty-seven thousand, six hundred fifty-two".