12640334061 has 8 divisors (see below), whose sum is σ = 16854351840. Its totient is φ = 8426602832.

The previous prime is 12640334059. The next prime is 12640334129. The reversal of 12640334061 is 16043304621.

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

It is a cyclic number.

It is not a de Polignac number, because 12640334061 - 2¹ = 12640334059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640334461) 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, 73030 + ... + 174968.

It is an arithmetic number, because the mean of its divisors is an integer number (2106793980).

Almost surely, 2^12640334061 is an apocalyptic number.

It is an amenable number.

12640334061 is a deficient number, since it is larger than the sum of its proper divisors (4214017779).

12640334061 is a wasteful number, since it uses less digits than its factorization.

12640334061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143275.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 12640334061 its reverse (16043304621), we get a palindrome (28683638682).

The spelling of 12640334061 in words is "twelve billion, six hundred forty million, three hundred thirty-four thousand, sixty-one".