634942543070477 has 2 divisors, whose sum is σ = 634942543070478. Its totient is φ = 634942543070476.

The previous prime is 634942543070389. The next prime is 634942543070497. The reversal of 634942543070477 is 774070345249436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627415278931081 + 7527264139396 = 25048259^2 + 2743586^2 .

It is a cyclic number.

It is not a de Polignac number, because 634942543070477 - 2⁴⁰ = 633843031442701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634942543070497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317471271535238 + 317471271535239.

It is an arithmetic number, because the mean of its divisors is an integer number (317471271535239).

Almost surely, 2^{634942543070477} is an apocalyptic number.

It is an amenable number.

634942543070477 is a deficient number, since it is larger than the sum of its proper divisors (1).

634942543070477 is an equidigital number, since it uses as much as digits as its factorization.

634942543070477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 426746880, while the sum is 65.

The spelling of 634942543070477 in words is "six hundred thirty-four trillion, nine hundred forty-two billion, five hundred forty-three million, seventy thousand, four hundred seventy-seven".