64631013646 has 8 divisors (see below), whose sum is σ = 97123755240. Its totient is φ = 32256428568.

The previous prime is 64631013583. The next prime is 64631013653.

64631013646 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 64631013599 and 64631013608.

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, 29537761 + ... + 29539948.

It is an arithmetic number, because the mean of its divisors is an integer number (12140469405).

Almost surely, 2^64631013646 is an apocalyptic number.

64631013646 is a deficient number, since it is larger than the sum of its proper divisors (32492741594).

64631013646 is a wasteful number, since it uses less digits than its factorization.

64631013646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59078258.

The product of its (nonzero) digits is 186624, while the sum is 40.

It can be divided in two parts, 646310 and 13646, that added together give a palindrome (659956).

The spelling of 64631013646 in words is "sixty-four billion, six hundred thirty-one million, thirteen thousand, six hundred forty-six".