635136402340121 has 8 divisors (see below), whose sum is σ = 702634893242688. Its totient is φ = 569264381098000.

The previous prime is 635136402340091. The next prime is 635136402340127. The reversal of 635136402340121 is 121043204631536.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 635136402340121 - 2¹⁸ = 635136402077977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635136402340127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406617414290 + ... + 406617415851.

It is an arithmetic number, because the mean of its divisors is an integer number (87829361655336).

Almost surely, 2^{635136402340121} is an apocalyptic number.

It is an amenable number.

635136402340121 is a deficient number, since it is larger than the sum of its proper divisors (67498490902567).

635136402340121 is a wasteful number, since it uses less digits than its factorization.

635136402340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813234830223.

The product of its (nonzero) digits is 311040, while the sum is 41.

Adding to 635136402340121 its reverse (121043204631536), we get a palindrome (756179606971657).

The spelling of 635136402340121 in words is "six hundred thirty-five trillion, one hundred thirty-six billion, four hundred two million, three hundred forty thousand, one hundred twenty-one".