63449810617 has 8 divisors (see below), whose sum is σ = 67354864200. Its totient is φ = 59563947264.

The previous prime is 63449810609. The next prime is 63449810657. The reversal of 63449810617 is 71601894436.

It can be written as a sum of positive squares in 4 ways, for example, as 1716942096 + 61732868521 = 41436^2 + 248461^2 .

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 63449810617 - 2³ = 63449810609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63449810657) 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, 4790742 + ... + 4803967.

It is an arithmetic number, because the mean of its divisors is an integer number (8419358025).

Almost surely, 2^63449810617 is an apocalyptic number.

It is an amenable number.

63449810617 is a deficient number, since it is larger than the sum of its proper divisors (3905053583).

63449810617 is a wasteful number, since it uses less digits than its factorization.

63449810617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9595115.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 63449810617 in words is "sixty-three billion, four hundred forty-nine million, eight hundred ten thousand, six hundred seventeen".