255103663921 has 16 divisors (see below), whose sum is σ = 265024476288. Its totient is φ = 245372400000.

The previous prime is 255103663889. The next prime is 255103664033. The reversal of 255103663921 is 129366301552.

It is a cyclic number.

It is not a de Polignac number, because 255103663921 - 2⁵ = 255103663889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255103663721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2567671 + ... + 2665171.

It is an arithmetic number, because the mean of its divisors is an integer number (16564029768).

Almost surely, 2^255103663921 is an apocalyptic number.

It is an amenable number.

255103663921 is a deficient number, since it is larger than the sum of its proper divisors (9920812367).

255103663921 is an equidigital number, since it uses as much as digits as its factorization.

255103663921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98472.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 255103663921 in words is "two hundred fifty-five billion, one hundred three million, six hundred sixty-three thousand, nine hundred twenty-one".