255620416417 has 2 divisors, whose sum is σ = 255620416418. Its totient is φ = 255620416416.

The previous prime is 255620416409. The next prime is 255620416439. The reversal of 255620416417 is 714614026552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234053731681 + 21566684736 = 483791^2 + 146856^2 .

It is a cyclic number.

It is not a de Polignac number, because 255620416417 - 2³ = 255620416409 is a prime.

It is not a weakly prime, because it can be changed into another prime (255620416477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127810208208 + 127810208209.

It is an arithmetic number, because the mean of its divisors is an integer number (127810208209).

Almost surely, 2^255620416417 is an apocalyptic number.

It is an amenable number.

255620416417 is a deficient number, since it is larger than the sum of its proper divisors (1).

255620416417 is an equidigital number, since it uses as much as digits as its factorization.

255620416417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 255620416417 in words is "two hundred fifty-five billion, six hundred twenty million, four hundred sixteen thousand, four hundred seventeen".