12640361611 has 8 divisors (see below), whose sum is σ = 13412827584. Its totient is φ = 11871108480.

The previous prime is 12640361609. The next prime is 12640361621. The reversal of 12640361611 is 11616304621.

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 12640361611 - 2¹ = 12640361609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12640361621) 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, 795100 + ... + 810841.

It is an arithmetic number, because the mean of its divisors is an integer number (1676603448).

Almost surely, 2^12640361611 is an apocalyptic number.

12640361611 is a deficient number, since it is larger than the sum of its proper divisors (772465973).

12640361611 is a wasteful number, since it uses less digits than its factorization.

12640361611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606421.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 12640361611 in words is "twelve billion, six hundred forty million, three hundred sixty-one thousand, six hundred eleven".