63641040 has 80 divisors (see below), whose sum is σ = 198195648. Its totient is φ = 16892928.

The previous prime is 63641033. The next prime is 63641093. The reversal of 63641040 is 4014636.

63641040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 63641040.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 67452 + ... + 68388.

Almost surely, 2^63641040 is an apocalyptic number.

63641040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63641040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99097824).

63641040 is an abundant number, since it is smaller than the sum of its proper divisors (134554608).

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

63641040 is a wasteful number, since it uses less digits than its factorization.

63641040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 63641040 is about 7977.5334533927. The cubic root of 63641040 is about 399.2507641570.

Adding to 63641040 its reverse (4014636), we get a palindrome (67655676).

The spelling of 63641040 in words is "sixty-three million, six hundred forty-one thousand, forty".