63781282720 has 72 divisors (see below), whose sum is σ = 160068514284. Its totient is φ = 24011759616.

The previous prime is 63781282699. The next prime is 63781282757. The reversal of 63781282720 is 2728218736.

It can be written as a sum of positive squares in 6 ways, for example, as 59140403344 + 4640879376 = 243188^2 + 68124^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 643437 + ... + 735916.

Almost surely, 2^63781282720 is an apocalyptic number.

It is an amenable number.

63781282720 is an abundant number, since it is smaller than the sum of its proper divisors (96287231564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63781282720 is a wasteful number, since it uses less digits than its factorization.

63781282720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379402 (or 1379377 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 63781282720 in words is "sixty-three billion, seven hundred eighty-one million, two hundred eighty-two thousand, seven hundred twenty".