635612138 has 16 divisors (see below), whose sum is σ = 1089967104. Its totient is φ = 272318640.

The previous prime is 635612129. The next prime is 635612141. The reversal of 635612138 is 831216536.

It is a junction number, because it is equal to n+sod(n) for n = 635612098 and 635612107.

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 7 ways as a sum of consecutive naturals, for example, 60023 + ... + 69813.

It is an arithmetic number, because the mean of its divisors is an integer number (68122944).

Almost surely, 2^635612138 is an apocalyptic number.

635612138 is a deficient number, since it is larger than the sum of its proper divisors (454354966).

635612138 is a wasteful number, since it uses less digits than its factorization.

635612138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14437.

The product of its digits is 25920, while the sum is 35.

The square root of 635612138 is about 25211.3493887178. The cubic root of 635612138 is about 859.7999074781.

The spelling of 635612138 in words is "six hundred thirty-five million, six hundred twelve thousand, one hundred thirty-eight".