63553641 has 4 divisors (see below), whose sum is σ = 84738192. Its totient is φ = 42369092.

The previous prime is 63553631. The next prime is 63553657. The reversal of 63553641 is 14635536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63553641 - 2⁷ = 63553513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63553631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10592271 + ... + 10592276.

It is an arithmetic number, because the mean of its divisors is an integer number (21184548).

Almost surely, 2^63553641 is an apocalyptic number.

It is an amenable number.

63553641 is a deficient number, since it is larger than the sum of its proper divisors (21184551).

63553641 is a wasteful number, since it uses less digits than its factorization.

63553641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21184550.

The product of its digits is 32400, while the sum is 33.

The square root of 63553641 is about 7972.0537504460. The cubic root of 63553641 is about 399.0679151483.

The spelling of 63553641 in words is "sixty-three million, five hundred fifty-three thousand, six hundred forty-one".