255278865646 has 16 divisors (see below), whose sum is σ = 437863943520. Its totient is φ = 109344470400.

The previous prime is 255278865643. The next prime is 255278865659. The reversal of 255278865646 is 646568872552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255278865643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5037031 + ... + 5087458.

It is an arithmetic number, because the mean of its divisors is an integer number (27366496470).

Almost surely, 2^255278865646 is an apocalyptic number.

255278865646 is a deficient number, since it is larger than the sum of its proper divisors (182585077874).

255278865646 is a wasteful number, since it uses less digits than its factorization.

255278865646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126299.

The product of its digits is 193536000, while the sum is 64.

The spelling of 255278865646 in words is "two hundred fifty-five billion, two hundred seventy-eight million, eight hundred sixty-five thousand, six hundred forty-six".