64624042646 has 4 divisors (see below), whose sum is σ = 96936063972. Its totient is φ = 32312021322.

The previous prime is 64624042631. The next prime is 64624042649.

64624042646 is nontrivially palindromic in base 10.

64624042646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 64624042597 and 64624042606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64624042649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16156010660 + ... + 16156010663.

It is an arithmetic number, because the mean of its divisors is an integer number (24234015993).

Almost surely, 2^64624042646 is an apocalyptic number.

64624042646 is a deficient number, since it is larger than the sum of its proper divisors (32312021326).

64624042646 is a wasteful number, since it uses less digits than its factorization.

64624042646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32312021325.

The product of its (nonzero) digits is 1327104, while the sum is 44.

It can be divided in two parts, 646240 and 42646, that added together give a palindrome (688886).

The spelling of 64624042646 in words is "sixty-four billion, six hundred twenty-four million, forty-two thousand, six hundred forty-six".