634403153566271 has 2 divisors, whose sum is σ = 634403153566272. Its totient is φ = 634403153566270.

The previous prime is 634403153566219. The next prime is 634403153566283. The reversal of 634403153566271 is 172665351304436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634403153566271 - 2¹⁴ = 634403153549887 is a prime.

It is a super-2 number, since 2×634403153566271² (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 (634403156566271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317201576783135 + 317201576783136.

It is an arithmetic number, because the mean of its divisors is an integer number (317201576783136).

Almost surely, 2^{634403153566271} is an apocalyptic number.

634403153566271 is a deficient number, since it is larger than the sum of its proper divisors (1).

634403153566271 is an equidigital number, since it uses as much as digits as its factorization.

634403153566271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 56.

The spelling of 634403153566271 in words is "six hundred thirty-four trillion, four hundred three billion, one hundred fifty-three million, five hundred sixty-six thousand, two hundred seventy-one".