11644345357 has 2 divisors, whose sum is σ = 11644345358. Its totient is φ = 11644345356.

The previous prime is 11644345291. The next prime is 11644345387. The reversal of 11644345357 is 75354344611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11451996196 + 192349161 = 107014^2 + 13869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11644345357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11644345387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5822172678 + 5822172679.

It is an arithmetic number, because the mean of its divisors is an integer number (5822172679).

Almost surely, 2^11644345357 is an apocalyptic number.

It is an amenable number.

11644345357 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644345357 is an equidigital number, since it uses as much as digits as its factorization.

11644345357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

Adding to 11644345357 its reverse (75354344611), we get a palindrome (86998689968).

The spelling of 11644345357 in words is "eleven billion, six hundred forty-four million, three hundred forty-five thousand, three hundred fifty-seven".