635622261361 has 8 divisors (see below), whose sum is σ = 640734282144. Its totient is φ = 630514179360.

The previous prime is 635622261349. The next prime is 635622261367. The reversal of 635622261361 is 163162226536.

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 635622261361 - 2⁷ = 635622261233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635622261367) 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, 660220 + ... + 1306573.

It is an arithmetic number, because the mean of its divisors is an integer number (80091785268).

Almost surely, 2^635622261361 is an apocalyptic number.

It is an amenable number.

635622261361 is a deficient number, since it is larger than the sum of its proper divisors (5112020783).

635622261361 is a wasteful number, since it uses less digits than its factorization.

635622261361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969391.

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

Adding to 635622261361 its reverse (163162226536), we get a palindrome (798784487897).

The spelling of 635622261361 in words is "six hundred thirty-five billion, six hundred twenty-two million, two hundred sixty-one thousand, three hundred sixty-one".