63118643 has 4 divisors (see below), whose sum is σ = 72135600. Its totient is φ = 54101688.

The previous prime is 63118577. The next prime is 63118661. The reversal of 63118643 is 34681136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63118643 - 2¹² = 63114547 is a prime.

It is a super-2 number, since 2×63118643² = 7967926188322898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63118663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4508468 + ... + 4508481.

It is an arithmetic number, because the mean of its divisors is an integer number (18033900).

Almost surely, 2^63118643 is an apocalyptic number.

63118643 is a deficient number, since it is larger than the sum of its proper divisors (9016957).

63118643 is an equidigital number, since it uses as much as digits as its factorization.

63118643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016956.

The product of its digits is 10368, while the sum is 32.

The square root of 63118643 is about 7944.7242242887. The cubic root of 63118643 is about 398.1553457873.

Adding to 63118643 its reverse (34681136), we get a palindrome (97799779).

The spelling of 63118643 in words is "sixty-three million, one hundred eighteen thousand, six hundred forty-three".