63546812872 has 32 divisors (see below), whose sum is σ = 126181049400. Its totient is φ = 29899183104.

The previous prime is 63546812869. The next prime is 63546812887. The reversal of 63546812872 is 27821864536.

It can be written as a sum of positive squares in 4 ways, for example, as 63235149156 + 311663716 = 251466^2 + 17654^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809638 + ... + 884650.

Almost surely, 2^63546812872 is an apocalyptic number.

It is an amenable number.

63546812872 is a deficient number, since it is larger than the sum of its proper divisors (62634236528).

63546812872 is a wasteful number, since it uses less digits than its factorization.

63546812872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81265 (or 81261 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 52.

The spelling of 63546812872 in words is "sixty-three billion, five hundred forty-six million, eight hundred twelve thousand, eight hundred seventy-two".