636060656401 has 4 divisors (see below), whose sum is σ = 636062981092. Its totient is φ = 636058331712.

The previous prime is 636060656339. The next prime is 636060656419. The reversal of 636060656401 is 104656060636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 482192748801 + 153867907600 = 694401^2 + 392260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636060656401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636060656701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687180 + ... + 1320733.

It is an arithmetic number, because the mean of its divisors is an integer number (159015745273).

Almost surely, 2^636060656401 is an apocalyptic number.

It is an amenable number.

636060656401 is a deficient number, since it is larger than the sum of its proper divisors (2324691).

636060656401 is a wasteful number, since it uses less digits than its factorization.

636060656401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324690.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 636060656401 in words is "six hundred thirty-six billion, sixty million, six hundred fifty-six thousand, four hundred one".