636064066145 has 8 divisors (see below), whose sum is σ = 763281173160. Its totient is φ = 508848390400.

The previous prime is 636064066129. The next prime is 636064066199. The reversal of 636064066145 is 541660460636.

It can be written as a sum of positive squares in 4 ways, for example, as 186692262241 + 449371803904 = 432079^2 + 670352^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 636064066145 - 2⁴ = 636064066129 is a prime.

It is a super-2 number, since 2×636064066145² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 636064066145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1452791 + ... + 1839219.

It is an arithmetic number, because the mean of its divisors is an integer number (95410146645).

Almost surely, 2^636064066145 is an apocalyptic number.

It is an amenable number.

636064066145 is a deficient number, since it is larger than the sum of its proper divisors (127217107015).

636064066145 is a wasteful number, since it uses less digits than its factorization.

636064066145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715635.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 636064066145 in words is "six hundred thirty-six billion, sixty-four million, sixty-six thousand, one hundred forty-five".