63554985 has 72 divisors (see below), whose sum is σ = 122128344. Its totient is φ = 30551040.

The previous prime is 63554971. The next prime is 63554999. The reversal of 63554985 is 58945536.

63554985 is a `hidden beast` number, since 6 + 3 + 554 + 98 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (63554971) and next prime (63554999).

It can be written as a sum of positive squares in 12 ways, for example, as 51108201 + 12446784 = 7149^2 + 3528^2 .

It is not a de Polignac number, because 63554985 - 2¹⁰ = 63553961 is a prime.

It is a super-2 number, since 2×63554985² = 8078472236700450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 63554985.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 463837 + ... + 463973.

It is an arithmetic number, because the mean of its divisors is an integer number (1696227).

Almost surely, 2^63554985 is an apocalyptic number.

63554985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63554985 is a deficient number, since it is larger than the sum of its proper divisors (58573359).

63554985 is a wasteful number, since it uses less digits than its factorization.

63554985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 219 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 63554985 is about 7972.1380444646. The cubic root of 63554985 is about 399.0707282234.

The spelling of 63554985 in words is "sixty-three million, five hundred fifty-four thousand, nine hundred eighty-five".