636134354020 has 48 divisors (see below), whose sum is σ = 1507578609600. Its totient is φ = 223344974720.

The previous prime is 636134354017. The next prime is 636134354027. The reversal of 636134354020 is 20453431636.

It is not an unprimeable number, because it can be changed into a prime (636134354027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49847410 + ... + 49860169.

It is an arithmetic number, because the mean of its divisors is an integer number (31407887700).

Almost surely, 2^636134354020 is an apocalyptic number.

It is an amenable number.

636134354020 is an abundant number, since it is smaller than the sum of its proper divisors (871444255580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636134354020 is a wasteful number, since it uses less digits than its factorization.

636134354020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99707628 (or 99707626 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 636134354020 its reverse (20453431636), we get a palindrome (656587785656).

The spelling of 636134354020 in words is "six hundred thirty-six billion, one hundred thirty-four million, three hundred fifty-four thousand, twenty".