636940059 has 16 divisors (see below), whose sum is σ = 1021658880. Its totient is φ = 344809440.

The previous prime is 636940049. The next prime is 636940103. The reversal of 636940059 is 950049636.

It is not a de Polignac number, because 636940059 - 2¹⁷ = 636808987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 636940059.

It is not an unprimeable number, because it can be changed into a prime (636940039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797772 + ... + 798569.

It is an arithmetic number, because the mean of its divisors is an integer number (63853680).

Almost surely, 2^636940059 is an apocalyptic number.

636940059 is a deficient number, since it is larger than the sum of its proper divisors (384718821).

636940059 is a wasteful number, since it uses less digits than its factorization.

636940059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596370.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 636940059 is about 25237.6714258665. The cubic root of 636940059 is about 860.3982556919.

The spelling of 636940059 in words is "six hundred thirty-six million, nine hundred forty thousand, fifty-nine".