63640894 has 16 divisors (see below), whose sum is σ = 101227968. Its totient is φ = 29903872.

The previous prime is 63640891. The next prime is 63640901. The reversal of 63640894 is 49804636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63640891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36654 + ... + 38350.

It is an arithmetic number, because the mean of its divisors is an integer number (6326748).

Almost surely, 2^63640894 is an apocalyptic number.

63640894 is a deficient number, since it is larger than the sum of its proper divisors (37587074).

63640894 is a wasteful number, since it uses less digits than its factorization.

63640894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 63640894 is about 7977.5243026894. The cubic root of 63640894 is about 399.2504588474.

The spelling of 63640894 in words is "sixty-three million, six hundred forty thousand, eight hundred ninety-four".