63539143645 has 64 divisors (see below), whose sum is σ = 87944693760. Its totient is φ = 43750195200.

The previous prime is 63539143639. The next prime is 63539143687. The reversal of 63539143645 is 54634193536.

It is a happy number.

It is not a de Polignac number, because 63539143645 - 2³³ = 54949209053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23078589 + ... + 23081341.

It is an arithmetic number, because the mean of its divisors is an integer number (1374135840).

Almost surely, 2^63539143645 is an apocalyptic number.

It is an amenable number.

63539143645 is a deficient number, since it is larger than the sum of its proper divisors (24405550115).

63539143645 is a wasteful number, since it uses less digits than its factorization.

63539143645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286.

The product of its digits is 3499200, while the sum is 49.

The spelling of 63539143645 in words is "sixty-three billion, five hundred thirty-nine million, one hundred forty-three thousand, six hundred forty-five".