63554990553 has 14 divisors (see below), whose sum is σ = 95288896394. Its totient is φ = 42369993216.

The previous prime is 63554990537. The next prime is 63554990573. The reversal of 63554990553 is 35509945536.

63554990553 is a `hidden beast` number, since 6 + 3 + 5 + 549 + 90 + 5 + 5 + 3 = 666.

63554990553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60953684544 + 2601306009 = 246888^2 + 51003^2 .

It is not a de Polignac number, because 63554990553 - 2⁴ = 63554990537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63554990553.

It is not an unprimeable number, because it can be changed into a prime (63554990533) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 43589800 + ... + 43591257.

Almost surely, 2^63554990553 is an apocalyptic number.

It is an amenable number.

63554990553 is a deficient number, since it is larger than the sum of its proper divisors (31733905841).

63554990553 is an frugal number, since it uses more digits than its factorization.

63554990553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87181075 (or 87181060 counting only the distinct ones).

The product of its (nonzero) digits is 10935000, while the sum is 54.

The spelling of 63554990553 in words is "sixty-three billion, five hundred fifty-four million, nine hundred ninety thousand, five hundred fifty-three".