255634975801 has 2 divisors, whose sum is σ = 255634975802. Its totient is φ = 255634975800.

The previous prime is 255634975747. The next prime is 255634975861. The reversal of 255634975801 is 108579436552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174239456400 + 81395519401 = 417420^2 + 285299^2 .

It is a cyclic number.

It is not a de Polignac number, because 255634975801 - 2²¹ = 255632878649 is a prime.

It is not a weakly prime, because it can be changed into another prime (255634975861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127817487900 + 127817487901.

It is an arithmetic number, because the mean of its divisors is an integer number (127817487901).

It is a 1-persistent number, because it is pandigital, but 2⋅255634975801 = 511269951602 is not.

Almost surely, 2^255634975801 is an apocalyptic number.

It is an amenable number.

255634975801 is a deficient number, since it is larger than the sum of its proper divisors (1).

255634975801 is an equidigital number, since it uses as much as digits as its factorization.

255634975801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072000, while the sum is 55.

The spelling of 255634975801 in words is "two hundred fifty-five billion, six hundred thirty-four million, nine hundred seventy-five thousand, eight hundred one".