63561641 has 8 divisors (see below), whose sum is σ = 74673984. Its totient is φ = 53338320.

The previous prime is 63561637. The next prime is 63561661. The reversal of 63561641 is 14616536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63561641 - 2² = 63561637 is a prime.

It is a super-2 number, since 2×63561641² = 8080164413225762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63561598 and 63561607.

It is not an unprimeable number, because it can be changed into a prime (63561601) by changing a digit.

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, 222101 + ... + 222386.

It is an arithmetic number, because the mean of its divisors is an integer number (9334248).

Almost surely, 2^63561641 is an apocalyptic number.

It is an amenable number.

63561641 is a deficient number, since it is larger than the sum of its proper divisors (11112343).

63561641 is a wasteful number, since it uses less digits than its factorization.

63561641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444511.

The product of its digits is 12960, while the sum is 32.

The square root of 63561641 is about 7972.5554874206. Note that the first 3 decimals coincide. The cubic root of 63561641 is about 399.0846590585.

It can be divided in two parts, 6356 and 1641, that added together give a palindrome (7997).

The spelling of 63561641 in words is "sixty-three million, five hundred sixty-one thousand, six hundred forty-one".