11641308647 has 4 divisors (see below), whose sum is σ = 11649788760. Its totient is φ = 11632828536.

The previous prime is 11641308643. The next prime is 11641308659. The reversal of 11641308647 is 74680314611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11641308647 - 2² = 11641308643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11641308641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4237997 + ... + 4240742.

It is an arithmetic number, because the mean of its divisors is an integer number (2912447190).

Almost surely, 2^11641308647 is an apocalyptic number.

11641308647 is a deficient number, since it is larger than the sum of its proper divisors (8480113).

11641308647 is an equidigital number, since it uses as much as digits as its factorization.

11641308647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480112.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 11641308647 in words is "eleven billion, six hundred forty-one million, three hundred eight thousand, six hundred forty-seven".