11643997006 has 4 divisors (see below), whose sum is σ = 17465995512. Its totient is φ = 5821998502.

The previous prime is 11643996989. The next prime is 11643997009. The reversal of 11643997006 is 60079934611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60079934611 = 1487 ⋅40403453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643997009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2910999250 + ... + 2910999253.

It is an arithmetic number, because the mean of its divisors is an integer number (4366498878).

Almost surely, 2^11643997006 is an apocalyptic number.

11643997006 is a deficient number, since it is larger than the sum of its proper divisors (5821998506).

11643997006 is an equidigital number, since it uses as much as digits as its factorization.

11643997006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821998505.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 11643997006 in words is "eleven billion, six hundred forty-three million, nine hundred ninety-seven thousand, six".