63739880720 has 40 divisors (see below), whose sum is σ = 148455777240. Its totient is φ = 25451125760.

The previous prime is 63739880713. The next prime is 63739880747. The reversal of 63739880720 is 2708893736.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2521244944 + 61218635776 = 50212^2 + 247424^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 654611 + ... + 745650.

It is an arithmetic number, because the mean of its divisors is an integer number (3711394431).

Almost surely, 2^63739880720 is an apocalyptic number.

It is an amenable number.

63739880720 is an abundant number, since it is smaller than the sum of its proper divisors (84715896520).

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

63739880720 is a wasteful number, since it uses less digits than its factorization.

63739880720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400843 (or 1400837 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 63739880720 in words is "sixty-three billion, seven hundred thirty-nine million, eight hundred eighty thousand, seven hundred twenty".