63623870449 has 2 divisors, whose sum is σ = 63623870450. Its totient is φ = 63623870448.

The previous prime is 63623870447. The next prime is 63623870477. The reversal of 63623870449 is 94407832636.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60405350625 + 3218519824 = 245775^2 + 56732^2 .

It is a cyclic number.

It is not a de Polignac number, because 63623870449 - 2¹ = 63623870447 is a prime.

It is a super-2 number, since 2×63623870449² (a number of 22 digits) contains 22 as substring.

Together with 63623870447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 63623870396 and 63623870405.

It is not a weakly prime, because it can be changed into another prime (63623870447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31811935224 + 31811935225.

It is an arithmetic number, because the mean of its divisors is an integer number (31811935225).

Almost surely, 2^63623870449 is an apocalyptic number.

It is an amenable number.

63623870449 is a deficient number, since it is larger than the sum of its proper divisors (1).

63623870449 is an equidigital number, since it uses as much as digits as its factorization.

63623870449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 63623870449 in words is "sixty-three billion, six hundred twenty-three million, eight hundred seventy thousand, four hundred forty-nine".