255657426626471 has 2 divisors, whose sum is σ = 255657426626472. Its totient is φ = 255657426626470.

The previous prime is 255657426626453. The next prime is 255657426626491. The reversal of 255657426626471 is 174626624756552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255657426626471 is a prime.

It is a super-3 number, since 3×255657426626471³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255657426626431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127828713313235 + 127828713313236.

It is an arithmetic number, because the mean of its divisors is an integer number (127828713313236).

Almost surely, 2^{255657426626471} is an apocalyptic number.

255657426626471 is a deficient number, since it is larger than the sum of its proper divisors (1).

255657426626471 is an equidigital number, since it uses as much as digits as its factorization.

255657426626471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064000, while the sum is 68.

The spelling of 255657426626471 in words is "two hundred fifty-five trillion, six hundred fifty-seven billion, four hundred twenty-six million, six hundred twenty-six thousand, four hundred seventy-one".