636104401 has 16 divisors (see below), whose sum is σ = 682813440. Its totient is φ = 590785920.

The previous prime is 636104389. The next prime is 636104423. The reversal of 636104401 is 104401636.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636104401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636104201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443181 + ... + 444613.

It is an arithmetic number, because the mean of its divisors is an integer number (42675840).

Almost surely, 2^636104401 is an apocalyptic number.

636104401 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

636104401 is a deficient number, since it is larger than the sum of its proper divisors (46709039).

636104401 is a wasteful number, since it uses less digits than its factorization.

636104401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 636104401 is about 25221.1102253648. The cubic root of 636104401 is about 860.0218134903.

The spelling of 636104401 in words is "six hundred thirty-six million, one hundred four thousand, four hundred one".