64623432646 has 8 divisors (see below), whose sum is σ = 98263027944. Its totient is φ = 31869090000.

The previous prime is 64623432617. The next prime is 64623432659.

64623432646 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64623432646² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64623432596 and 64623432605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221312980 + ... + 221313271.

It is an arithmetic number, because the mean of its divisors is an integer number (12282878493).

Almost surely, 2^64623432646 is an apocalyptic number.

64623432646 is a deficient number, since it is larger than the sum of its proper divisors (33639595298).

64623432646 is a wasteful number, since it uses less digits than its factorization.

64623432646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442626326.

The product of its digits is 2985984, while the sum is 46.

The spelling of 64623432646 in words is "sixty-four billion, six hundred twenty-three million, four hundred thirty-two thousand, six hundred forty-six".