636427688048771 has 8 divisors (see below), whose sum is σ = 643590667044864. Its totient is φ = 629304614228680.

The previous prime is 636427688048743. The next prime is 636427688048843. The reversal of 636427688048771 is 177840886724636.

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 636427688048771 - 2¹⁴ = 636427688032387 is a prime.

It is a super-3 number, since 3×636427688048771³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636427688048692 and 636427688048701.

It is not an unprimeable number, because it can be changed into a prime (636427688042771) 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, 9976261925 + ... + 9976325718.

It is an arithmetic number, because the mean of its divisors is an integer number (80448833380608).

Almost surely, 2^{636427688048771} is an apocalyptic number.

636427688048771 is a deficient number, since it is larger than the sum of its proper divisors (7162978996093).

636427688048771 is a wasteful number, since it uses less digits than its factorization.

636427688048771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19952588001.

The product of its (nonzero) digits is 3641573376, while the sum is 77.

The spelling of 636427688048771 in words is "six hundred thirty-six trillion, four hundred twenty-seven billion, six hundred eighty-eight million, forty-eight thousand, seven hundred seventy-one".