636112641545 has 4 divisors (see below), whose sum is σ = 763335169860. Its totient is φ = 508890113232.

The previous prime is 636112641481. The next prime is 636112641553. The reversal of 636112641545 is 545146211636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98663835664 + 537448805881 = 314108^2 + 733109^2 .

It is a cyclic number.

It is not a de Polignac number, because 636112641545 - 2⁶ = 636112641481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 636112641496 and 636112641505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63611264150 + ... + 63611264159.

It is an arithmetic number, because the mean of its divisors is an integer number (190833792465).

Almost surely, 2^636112641545 is an apocalyptic number.

It is an amenable number.

636112641545 is a deficient number, since it is larger than the sum of its proper divisors (127222528315).

636112641545 is a wasteful number, since it uses less digits than its factorization.

636112641545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127222528314.

The product of its digits is 518400, while the sum is 44.

The spelling of 636112641545 in words is "six hundred thirty-six billion, one hundred twelve million, six hundred forty-one thousand, five hundred forty-five".