255441400541981 has 2 divisors, whose sum is σ = 255441400541982. Its totient is φ = 255441400541980.

The previous prime is 255441400541947. The next prime is 255441400542047. The reversal of 255441400541981 is 189145004144552.

It is a happy number.

255441400541981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190210740639481 + 65230659902500 = 13791691^2 + 8076550^2 .

It is a cyclic number.

It is not a de Polignac number, because 255441400541981 - 2¹⁸ = 255441400279837 is a prime.

It is a super-2 number, since 2×255441400541981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255441400541381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127720700270990 + 127720700270991.

It is an arithmetic number, because the mean of its divisors is an integer number (127720700270991).

Almost surely, 2^{255441400541981} is an apocalyptic number.

It is an amenable number.

255441400541981 is a deficient number, since it is larger than the sum of its proper divisors (1).

255441400541981 is an equidigital number, since it uses as much as digits as its factorization.

255441400541981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608000, while the sum is 53.

The spelling of 255441400541981 in words is "two hundred fifty-five trillion, four hundred forty-one billion, four hundred million, five hundred forty-one thousand, nine hundred eighty-one".