63889004709 has 24 divisors (see below), whose sum is σ = 94862790360. Its totient is φ = 41404566528.

The previous prime is 63889004681. The next prime is 63889004761. The reversal of 63889004709 is 90740098836.

63889004709 is a `hidden beast` number, since 6 + 3 + 88 + 90 + 0 + 470 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7335408609 + 56553596100 = 85647^2 + 237810^2 .

It is not a de Polignac number, because 63889004709 - 2⁹ = 63889004197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63889004779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 290989 + ... + 460925.

It is an arithmetic number, because the mean of its divisors is an integer number (3952616265).

Almost surely, 2^63889004709 is an apocalyptic number.

It is an amenable number.

63889004709 is a deficient number, since it is larger than the sum of its proper divisors (30973785651).

63889004709 is a wasteful number, since it uses less digits than its factorization.

63889004709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171109 (or 171106 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 63889004709 in words is "sixty-three billion, eight hundred eighty-nine million, four thousand, seven hundred nine".