636948474790 has 32 divisors (see below), whose sum is σ = 1187232137280. Its totient is φ = 245747048064.

The previous prime is 636948474671. The next prime is 636948474793. The reversal of 636948474790 is 97474849636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636948474793) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 812362 + ... + 1390621.

It is an arithmetic number, because the mean of its divisors is an integer number (37101004290).

Almost surely, 2^636948474790 is an apocalyptic number.

636948474790 is a deficient number, since it is larger than the sum of its proper divisors (550283662490).

636948474790 is a wasteful number, since it uses less digits than its factorization.

636948474790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204016.

The product of its (nonzero) digits is 219469824, while the sum is 67.

The spelling of 636948474790 in words is "six hundred thirty-six billion, nine hundred forty-eight million, four hundred seventy-four thousand, seven hundred ninety".