63446520073 has 32 divisors (see below), whose sum is σ = 71132774400. Its totient is φ = 56374925376.

The previous prime is 63446520041. The next prime is 63446520113. The reversal of 63446520073 is 37002564436.

It is not a de Polignac number, because 63446520073 - 2⁵ = 63446520041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63446524073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1832440 + ... + 1866742.

It is an arithmetic number, because the mean of its divisors is an integer number (2222899200).

Almost surely, 2^63446520073 is an apocalyptic number.

It is an amenable number.

63446520073 is a deficient number, since it is larger than the sum of its proper divisors (7686254327).

63446520073 is a wasteful number, since it uses less digits than its factorization.

63446520073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34461.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 63446520073 in words is "sixty-three billion, four hundred forty-six million, five hundred twenty thousand, seventy-three".