63555601 has 4 divisors (see below), whose sum is σ = 66318912. Its totient is φ = 60792292.

The previous prime is 63555587. The next prime is 63555619. The reversal of 63555601 is 10655536.

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 63555601 - 2¹³ = 63547409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63555671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381621 + ... + 1381666.

It is an arithmetic number, because the mean of its divisors is an integer number (16579728).

Almost surely, 2^63555601 is an apocalyptic number.

It is an amenable number.

63555601 is a deficient number, since it is larger than the sum of its proper divisors (2763311).

63555601 is a wasteful number, since it uses less digits than its factorization.

63555601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763310.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 63555601 is about 7972.1766789253. The cubic root of 63555601 is about 399.0720175362.

The spelling of 63555601 in words is "sixty-three million, five hundred fifty-five thousand, six hundred one".