634432255634201 has 2 divisors, whose sum is σ = 634432255634202. Its totient is φ = 634432255634200.

The previous prime is 634432255634189. The next prime is 634432255634269. The reversal of 634432255634201 is 102436552234436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626402535961225 + 8029719672976 = 25028035^2 + 2833676^2 .

It is a cyclic number.

It is not a de Polignac number, because 634432255634201 - 2³⁰ = 634431181892377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634432255634201.

It is not a weakly prime, because it can be changed into another prime (634432255631201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317216127817100 + 317216127817101.

It is an arithmetic number, because the mean of its divisors is an integer number (317216127817101).

Almost surely, 2^{634432255634201} is an apocalyptic number.

It is an amenable number.

634432255634201 is a deficient number, since it is larger than the sum of its proper divisors (1).

634432255634201 is an equidigital number, since it uses as much as digits as its factorization.

634432255634201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12441600, while the sum is 50.

The spelling of 634432255634201 in words is "six hundred thirty-four trillion, four hundred thirty-two billion, two hundred fifty-five million, six hundred thirty-four thousand, two hundred one".