63467681 has 8 divisors (see below), whose sum is σ = 68148864. Its totient is φ = 58891840.

The previous prime is 63467653. The next prime is 63467683. The reversal of 63467681 is 18676436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63467681 - 2¹⁸ = 63205537 is a prime.

It is a super-2 number, since 2×63467681² = 8056293063035522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63467683) 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 7 ways as a sum of consecutive naturals, for example, 25085 + ... + 27498.

It is an arithmetic number, because the mean of its divisors is an integer number (8518608).

Almost surely, 2^63467681 is an apocalyptic number.

It is an amenable number.

63467681 is a deficient number, since it is larger than the sum of its proper divisors (4681183).

63467681 is a wasteful number, since it uses less digits than its factorization.

63467681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52671.

The product of its digits is 145152, while the sum is 41.

The square root of 63467681 is about 7966.6605927452. The cubic root of 63467681 is about 398.8879131055.

The spelling of 63467681 in words is "sixty-three million, four hundred sixty-seven thousand, six hundred eighty-one".