63613641 has 32 divisors (see below), whose sum is σ = 106839040. Its totient is φ = 32768064.

The previous prime is 63613639. The next prime is 63613661. The reversal of 63613641 is 14631636.

It is not a de Polignac number, because 63613641 - 2¹ = 63613639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63613599 and 63613608.

It is not an unprimeable number, because it can be changed into a prime (63613661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9030 + ... + 14448.

It is an arithmetic number, because the mean of its divisors is an integer number (3338720).

Almost surely, 2^63613641 is an apocalyptic number.

It is an amenable number.

63613641 is a deficient number, since it is larger than the sum of its proper divisors (43225399).

63613641 is a wasteful number, since it uses less digits than its factorization.

63613641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485.

The product of its digits is 7776, while the sum is 30.

The square root of 63613641 is about 7975.8160084094. The cubic root of 63613641 is about 399.1934602438.

The spelling of 63613641 in words is "sixty-three million, six hundred thirteen thousand, six hundred forty-one".