636060128421 has 8 divisors (see below), whose sum is σ = 848100355360. Its totient is φ = 424029993552.

The previous prime is 636060128419. The next prime is 636060128423. The reversal of 636060128421 is 124821060636.

It is an interprime number because it is at equal distance from previous prime (636060128419) and next prime (636060128423).

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

It is not a de Polignac number, because 636060128421 - 2¹ = 636060128419 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 636060128421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636060128423) 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, 2374711 + ... + 2628948.

It is an arithmetic number, because the mean of its divisors is an integer number (106012544420).

Almost surely, 2^636060128421 is an apocalyptic number.

It is an amenable number.

636060128421 is a deficient number, since it is larger than the sum of its proper divisors (212040226939).

636060128421 is a wasteful number, since it uses less digits than its factorization.

636060128421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046035.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 636060128421 in words is "six hundred thirty-six billion, sixty million, one hundred twenty-eight thousand, four hundred twenty-one".