11638614671 has 2 divisors, whose sum is σ = 11638614672. Its totient is φ = 11638614670.

The previous prime is 11638614667. The next prime is 11638614683. The reversal of 11638614671 is 17641683611.

It is a weak prime.

It is an emirp because it is prime and its reverse (17641683611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11638614671 - 2² = 11638614667 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638614641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819307335 + 5819307336.

It is an arithmetic number, because the mean of its divisors is an integer number (5819307336).

Almost surely, 2^11638614671 is an apocalyptic number.

11638614671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638614671 is an equidigital number, since it uses as much as digits as its factorization.

11638614671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The spelling of 11638614671 in words is "eleven billion, six hundred thirty-eight million, six hundred fourteen thousand, six hundred seventy-one".