63533399121 has 6 divisors (see below), whose sum is σ = 91770465410. Its totient is φ = 42355599408.

The previous prime is 63533399119. The next prime is 63533399131. The reversal of 63533399121 is 12199333536.

63533399121 is a `hidden beast` number, since 6 + 3 + 533 + 3 + 9 + 91 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63375545025 + 157854096 = 251745^2 + 12564^2 .

It is not a de Polignac number, because 63533399121 - 2¹ = 63533399119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63533399131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3529633276 + ... + 3529633293.

Almost surely, 2^63533399121 is an apocalyptic number.

It is an amenable number.

63533399121 is a deficient number, since it is larger than the sum of its proper divisors (28237066289).

63533399121 is a wasteful number, since it uses less digits than its factorization.

63533399121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7059266575 (or 7059266572 counting only the distinct ones).

The product of its digits is 393660, while the sum is 45.

The spelling of 63533399121 in words is "sixty-three billion, five hundred thirty-three million, three hundred ninety-nine thousand, one hundred twenty-one".