63553066521 has 16 divisors (see below), whose sum is σ = 98484172800. Its totient is φ = 35700511248.

The previous prime is 63553066519. The next prime is 63553066597. The reversal of 63553066521 is 12566035536.

63553066521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63553066521 - 2¹ = 63553066519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63553066121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25645681 + ... + 25648158.

It is an arithmetic number, because the mean of its divisors is an integer number (6155260800).

Almost surely, 2^63553066521 is an apocalyptic number.

It is an amenable number.

63553066521 is a deficient number, since it is larger than the sum of its proper divisors (34931106279).

63553066521 is a wasteful number, since it uses less digits than its factorization.

63553066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51293908.

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 63553066521 in words is "sixty-three billion, five hundred fifty-three million, sixty-six thousand, five hundred twenty-one".