64642024647 has 10 divisors (see below), whose sum is σ = 96564012248. Its totient is φ = 43094683044.

The previous prime is 64642024619. The next prime is 64642024673. The reversal of 64642024647 is 74642024646.

It is not a de Polignac number, because 64642024647 - 2⁷ = 64642024519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642024547) 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 9 ways as a sum of consecutive naturals, for example, 399024763 + ... + 399024924.

Almost surely, 2^64642024647 is an apocalyptic number.

64642024647 is a deficient number, since it is larger than the sum of its proper divisors (31921987601).

64642024647 is an equidigital number, since it uses as much as digits as its factorization.

64642024647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798049699 (or 798049690 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 45.

Subtracting 64642024647 from its reverse (74642024646), we obtain a palindrome (9999999999).

The spelling of 64642024647 in words is "sixty-four billion, six hundred forty-two million, twenty-four thousand, six hundred forty-seven".