636212071145 has 16 divisors (see below), whose sum is σ = 872550981120. Its totient is φ = 436243921344.

The previous prime is 636212071141. The next prime is 636212071151. The reversal of 636212071145 is 541170212636.

It is not a de Polignac number, because 636212071145 - 2² = 636212071141 is a prime.

It is a super-2 number, since 2×636212071145² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636212071099 and 636212071108.

It is not an unprimeable number, because it can be changed into a prime (636212071141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697424 + ... + 1326206.

It is an arithmetic number, because the mean of its divisors is an integer number (54534436320).

Almost surely, 2^636212071145 is an apocalyptic number.

It is an amenable number.

636212071145 is a deficient number, since it is larger than the sum of its proper divisors (236338909975).

636212071145 is a wasteful number, since it uses less digits than its factorization.

636212071145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657704.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 636212071145 in words is "six hundred thirty-six billion, two hundred twelve million, seventy-one thousand, one hundred forty-five".