636630321473 has 8 divisors (see below), whose sum is σ = 657184915200. Its totient is φ = 616076861040.

The previous prime is 636630321469. The next prime is 636630321487. The reversal of 636630321473 is 374123036636.

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 636630321473 - 2² = 636630321469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636630321403) 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, 942578 + ... + 1470276.

It is an arithmetic number, because the mean of its divisors is an integer number (82148114400).

Almost surely, 2^636630321473 is an apocalyptic number.

It is an amenable number.

636630321473 is a deficient number, since it is larger than the sum of its proper divisors (20554593727).

636630321473 is a wasteful number, since it uses less digits than its factorization.

636630321473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566647.

The product of its (nonzero) digits is 979776, while the sum is 44.

The spelling of 636630321473 in words is "six hundred thirty-six billion, six hundred thirty million, three hundred twenty-one thousand, four hundred seventy-three".