64958421100689 has 12 divisors (see below), whose sum is σ = 94796138010756. Its totient is φ = 42859164436992.

The previous prime is 64958421100687. The next prime is 64958421100717. The reversal of 64958421100689 is 98600112485946.

64958421100689 is a `hidden beast` number, since 6 + 49 + 5 + 8 + 421 + 100 + 68 + 9 = 666.

64958421100689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16682258009664 + 48276163091025 = 4084392^2 + 6948105^2 .

It is not a de Polignac number, because 64958421100689 - 2¹ = 64958421100687 is a prime.

It is a super-4 number, since 4×64958421100689⁴ (a number of 56 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64958421100681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37204134924 + ... + 37204136669.

It is an arithmetic number, because the mean of its divisors is an integer number (7899678167563).

Almost surely, 2^{64958421100689} is an apocalyptic number.

It is an amenable number.

64958421100689 is a deficient number, since it is larger than the sum of its proper divisors (29837716910067).

64958421100689 is a wasteful number, since it uses less digits than its factorization.

64958421100689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74408271696 (or 74408271693 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 64958421100689 in words is "sixty-four trillion, nine hundred fifty-eight billion, four hundred twenty-one million, one hundred thousand, six hundred eighty-nine".