636066423621445 has 8 divisors (see below), whose sum is σ = 764174526297336. Its totient is φ = 508256593596096.

The previous prime is 636066423621401. The next prime is 636066423621449. The reversal of 636066423621445 is 544126324660636.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 220675397121 + 635845748224324 = 469761^2 + 25215982^2 .

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 636066423621445 - 2⁹ = 636066423620933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 636066423621445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636066423621449) 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, 74568157942 + ... + 74568166471.

It is an arithmetic number, because the mean of its divisors is an integer number (95521815787167).

Almost surely, 2^{636066423621445} is an apocalyptic number.

It is an amenable number.

636066423621445 is a deficient number, since it is larger than the sum of its proper divisors (128108102675891).

636066423621445 is a wasteful number, since it uses less digits than its factorization.

636066423621445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149136325271.

The product of its (nonzero) digits is 89579520, while the sum is 58.

The spelling of 636066423621445 in words is "six hundred thirty-six trillion, sixty-six billion, four hundred twenty-three million, six hundred twenty-one thousand, four hundred forty-five".