255112125661 has 2 divisors, whose sum is σ = 255112125662. Its totient is φ = 255112125660.

The previous prime is 255112125641. The next prime is 255112125713. The reversal of 255112125661 is 166521211552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233743240900 + 21368884761 = 483470^2 + 146181^2 .

It is a cyclic number.

It is not a de Polignac number, because 255112125661 - 2⁵ = 255112125629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255112125661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255112125641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127556062830 + 127556062831.

It is an arithmetic number, because the mean of its divisors is an integer number (127556062831).

Almost surely, 2^255112125661 is an apocalyptic number.

It is an amenable number.

255112125661 is a deficient number, since it is larger than the sum of its proper divisors (1).

255112125661 is an equidigital number, since it uses as much as digits as its factorization.

255112125661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 37.

The spelling of 255112125661 in words is "two hundred fifty-five billion, one hundred twelve million, one hundred twenty-five thousand, six hundred sixty-one".