64633033646 has 4 divisors (see below), whose sum is σ = 96949550472. Its totient is φ = 32316516822.

The previous prime is 64633033627. The next prime is 64633033649.

64633033646 is nontrivially palindromic in base 10.

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 = 64633033597 and 64633033606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64633033649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16158258410 + ... + 16158258413.

It is an arithmetic number, because the mean of its divisors is an integer number (24237387618).

Almost surely, 2^64633033646 is an apocalyptic number.

64633033646 is a deficient number, since it is larger than the sum of its proper divisors (32316516826).

64633033646 is a wasteful number, since it uses less digits than its factorization.

64633033646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32316516825.

The product of its (nonzero) digits is 1679616, while the sum is 44.

It can be divided in two parts, 646330 and 33646, that added together give a palindrome (679976).

The spelling of 64633033646 in words is "sixty-four billion, six hundred thirty-three million, thirty-three thousand, six hundred forty-six".