634185338853 has 8 divisors (see below), whose sum is σ = 922451402016. Its totient is φ = 384354750800.

The previous prime is 634185338837. The next prime is 634185338893. The reversal of 634185338853 is 358833581436.

It is a happy number.

634185338853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 634185338853 - 2⁴ = 634185338837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634185338793 and 634185338802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634185338803) 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, 9608868738 + ... + 9608868803.

It is an arithmetic number, because the mean of its divisors is an integer number (115306425252).

Almost surely, 2^634185338853 is an apocalyptic number.

It is an amenable number.

634185338853 is a deficient number, since it is larger than the sum of its proper divisors (288266063163).

634185338853 is a wasteful number, since it uses less digits than its factorization.

634185338853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19217737555.

The product of its digits is 24883200, while the sum is 57.

The spelling of 634185338853 in words is "six hundred thirty-four billion, one hundred eighty-five million, three hundred thirty-eight thousand, eight hundred fifty-three".