63640696 has 48 divisors (see below), whose sum is σ = 139136400. Its totient is φ = 26729472.

The previous prime is 63640693. The next prime is 63640699. The reversal of 63640696 is 69604636.

63640696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63640693) and next prime (63640699).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63640693) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 563136 + ... + 563248.

It is an arithmetic number, because the mean of its divisors is an integer number (2898675).

Almost surely, 2^63640696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63640696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69568200).

63640696 is an abundant number, since it is smaller than the sum of its proper divisors (75495704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63640696 is a wasteful number, since it uses less digits than its factorization.

63640696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 63640696 is about 7977.5118928147. The cubic root of 63640696 is about 399.2500447967.

The spelling of 63640696 in words is "sixty-three million, six hundred forty thousand, six hundred ninety-six".