636120315253 has 8 divisors (see below), whose sum is σ = 664555909248. Its totient is φ = 607749570384.

The previous prime is 636120315179. The next prime is 636120315317. The reversal of 636120315253 is 352513021636.

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 636120315253 - 2¹³ = 636120307061 is a prime.

It is a super-2 number, since 2×636120315253² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636121315253) 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, 16192225 + ... + 16231462.

It is an arithmetic number, because the mean of its divisors is an integer number (83069488656).

Almost surely, 2^636120315253 is an apocalyptic number.

It is an amenable number.

636120315253 is a deficient number, since it is larger than the sum of its proper divisors (28435593995).

636120315253 is a wasteful number, since it uses less digits than its factorization.

636120315253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424563.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 636120315253 its reverse (352513021636), we get a palindrome (988633336889).

The spelling of 636120315253 in words is "six hundred thirty-six billion, one hundred twenty million, three hundred fifteen thousand, two hundred fifty-three".