11644601251 has 2 divisors, whose sum is σ = 11644601252. Its totient is φ = 11644601250.

The previous prime is 11644601249. The next prime is 11644601303. The reversal of 11644601251 is 15210644611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11644601251 - 2¹ = 11644601249 is a prime.

Together with 11644601249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11644601051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5822300625 + 5822300626.

It is an arithmetic number, because the mean of its divisors is an integer number (5822300626).

Almost surely, 2^11644601251 is an apocalyptic number.

11644601251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644601251 is an equidigital number, since it uses as much as digits as its factorization.

11644601251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 11644601251 in words is "eleven billion, six hundred forty-four million, six hundred one thousand, two hundred fifty-one".