636461672612 has 24 divisors (see below), whose sum is σ = 1173955015800. Its totient is φ = 301460047616.

The previous prime is 636461672593. The next prime is 636461672653. The reversal of 636461672612 is 216276164636.

It can be written as a sum of positive squares in 4 ways, for example, as 315682164736 + 320779507876 = 561856^2 + 566374^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51755537 + ... + 51767832.

It is an arithmetic number, because the mean of its divisors is an integer number (48914792325).

Almost surely, 2^636461672612 is an apocalyptic number.

It is an amenable number.

636461672612 is a deficient number, since it is larger than the sum of its proper divisors (537493343188).

636461672612 is a wasteful number, since it uses less digits than its factorization.

636461672612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103523455 (or 103523453 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 50.

The spelling of 636461672612 in words is "six hundred thirty-six billion, four hundred sixty-one million, six hundred seventy-two thousand, six hundred twelve".