636120774 has 12 divisors (see below), whose sum is σ = 1378261716. Its totient is φ = 212040252.

The previous prime is 636120769. The next prime is 636120799. The reversal of 636120774 is 477021636.

636120774 is a `hidden beast` number, since 636 + 12 + 0 + 7 + 7 + 4 = 666.

It is a super-2 number, since 2×636120774² = 809299278228718152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17670004 + ... + 17670039.

It is an arithmetic number, because the mean of its divisors is an integer number (114855143).

Almost surely, 2^636120774 is an apocalyptic number.

636120774 is an abundant number, since it is smaller than the sum of its proper divisors (742140942).

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

636120774 is a wasteful number, since it uses less digits than its factorization.

636120774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35340051 (or 35340048 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 636120774 is about 25221.4348124765. The cubic root of 636120774 is about 860.0291922667.

The spelling of 636120774 in words is "six hundred thirty-six million, one hundred twenty thousand, seven hundred seventy-four".