64012118721 has 8 divisors (see below), whose sum is σ = 86308475040. Its totient is φ = 42195254112.

The previous prime is 64012118717. The next prime is 64012118741. The reversal of 64012118721 is 12781121046.

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

It is not a de Polignac number, because 64012118721 - 2² = 64012118717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64012118711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119872615 + ... + 119873148.

It is an arithmetic number, because the mean of its divisors is an integer number (10788559380).

Almost surely, 2^64012118721 is an apocalyptic number.

It is an amenable number.

64012118721 is a deficient number, since it is larger than the sum of its proper divisors (22296356319).

64012118721 is a wasteful number, since it uses less digits than its factorization.

64012118721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239745855.

The product of its (nonzero) digits is 5376, while the sum is 33.

Adding to 64012118721 its reverse (12781121046), we get a palindrome (76793239767).

The spelling of 64012118721 in words is "sixty-four billion, twelve million, one hundred eighteen thousand, seven hundred twenty-one".