63889731090 has 24 divisors (see below), whose sum is σ = 166113301068. Its totient is φ = 17037261600.

The previous prime is 63889731049. The next prime is 63889731091. The reversal of 63889731090 is 9013798836.

It can be written as a sum of positive squares in 2 ways, for example, as 62134037289 + 1755693801 = 249267^2 + 41901^2 .

It is not an unprimeable number, because it can be changed into a prime (63889731091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354942861 + ... + 354943040.

Almost surely, 2^63889731090 is an apocalyptic number.

63889731090 is an abundant number, since it is smaller than the sum of its proper divisors (102223569978).

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

63889731090 is a wasteful number, since it uses less digits than its factorization.

63889731090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709885914 (or 709885911 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 63889731090 in words is "sixty-three billion, eight hundred eighty-nine million, seven hundred thirty-one thousand, ninety".