634394169601 has 2 divisors, whose sum is σ = 634394169602. Its totient is φ = 634394169600.

The previous prime is 634394169593. The next prime is 634394169631. The reversal of 634394169601 is 106961493436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623469739201 + 10924430400 = 789601^2 + 104520^2 .

It is a cyclic number.

It is not a de Polignac number, because 634394169601 - 2³ = 634394169593 is a prime.

It is not a weakly prime, because it can be changed into another prime (634394169631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317197084800 + 317197084801.

It is an arithmetic number, because the mean of its divisors is an integer number (317197084801).

Almost surely, 2^634394169601 is an apocalyptic number.

It is an amenable number.

634394169601 is a deficient number, since it is larger than the sum of its proper divisors (1).

634394169601 is an equidigital number, since it uses as much as digits as its factorization.

634394169601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 634394169601 in words is "six hundred thirty-four billion, three hundred ninety-four million, one hundred sixty-nine thousand, six hundred one".