636621422330516 has 24 divisors (see below), whose sum is σ = 1274108407520256. Its totient is φ = 272652274671840.

The previous prime is 636621422330483. The next prime is 636621422330587. The reversal of 636621422330516 is 615033224126636.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7728197891 + ... + 7728280266.

It is an arithmetic number, because the mean of its divisors is an integer number (53087850313344).

Almost surely, 2^{636621422330516} is an apocalyptic number.

It is an amenable number.

636621422330516 is an abundant number, since it is smaller than the sum of its proper divisors (637486985189740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636621422330516 is a wasteful number, since it uses less digits than its factorization.

636621422330516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15456479639 (or 15456479637 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 636621422330516 in words is "six hundred thirty-six trillion, six hundred twenty-one billion, four hundred twenty-two million, three hundred thirty thousand, five hundred sixteen".