63642449 has 8 divisors (see below), whose sum is σ = 71518272. Its totient is φ = 56192400.

The previous prime is 63642437. The next prime is 63642461. The reversal of 63642449 is 94424636.

It is an interprime number because it is at equal distance from previous prime (63642437) and next prime (63642461).

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 63642449 - 2²⁴ = 46865233 is a prime.

It is a super-2 number, since 2×63642449² = 8100722629435202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63642409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106127 + ... + 106724.

It is an arithmetic number, because the mean of its divisors is an integer number (8939784).

Almost surely, 2^63642449 is an apocalyptic number.

It is an amenable number.

63642449 is a deficient number, since it is larger than the sum of its proper divisors (7875823).

63642449 is a wasteful number, since it uses less digits than its factorization.

63642449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212887.

The product of its digits is 124416, while the sum is 38.

The square root of 63642449 is about 7977.6217634079. The cubic root of 63642449 is about 399.2537105795.

The spelling of 63642449 in words is "sixty-three million, six hundred forty-two thousand, four hundred forty-nine".