63706744989 has 12 divisors (see below), whose sum is σ = 92030130972. Its totient is φ = 42466881600.

The previous prime is 63706744949. The next prime is 63706745041. The reversal of 63706744989 is 98944760736.

63706744989 is a `hidden beast` number, since 6 + 3 + 70 + 6 + 74 + 498 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32259752100 + 31446992889 = 179610^2 + 177333^2 .

It is not a de Polignac number, because 63706744989 - 2¹¹ = 63706742941 is a prime.

It is a super-2 number, since 2×63706744989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63706744949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261232 + ... + 442329.

It is an arithmetic number, because the mean of its divisors is an integer number (7669177581).

Almost surely, 2^63706744989 is an apocalyptic number.

It is an amenable number.

63706744989 is a deficient number, since it is larger than the sum of its proper divisors (28323385983).

63706744989 is a wasteful number, since it uses less digits than its factorization.

63706744989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713628 (or 713625 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 63706744989 in words is "sixty-three billion, seven hundred six million, seven hundred forty-four thousand, nine hundred eighty-nine".