63640115 has 32 divisors (see below), whose sum is σ = 97265664. Its totient is φ = 38816640.

The previous prime is 63640079. The next prime is 63640127. The reversal of 63640115 is 51104636.

63640115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63640115 - 2¹² = 63636019 is a prime.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 16337 + ... + 19853.

It is an arithmetic number, because the mean of its divisors is an integer number (3039552).

Almost surely, 2^63640115 is an apocalyptic number.

63640115 is a deficient number, since it is larger than the sum of its proper divisors (33625549).

63640115 is a wasteful number, since it uses less digits than its factorization.

63640115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 63640115 is about 7977.4754778689. The cubic root of 63640115 is about 399.2488298248.

The spelling of 63640115 in words is "sixty-three million, six hundred forty thousand, one hundred fifteen".