11643765457 has 2 divisors, whose sum is σ = 11643765458. Its totient is φ = 11643765456.

The previous prime is 11643765391. The next prime is 11643765491. The reversal of 11643765457 is 75456734611.

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., 10335568896 + 1308196561 = 101664^2 + 36169^2 .

It is an emirp because it is prime and its reverse (75456734611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11643765457 - 2¹⁵ = 11643732689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11643765457.

It is not a weakly prime, because it can be changed into another prime (11643775457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821882728 + 5821882729.

It is an arithmetic number, because the mean of its divisors is an integer number (5821882729).

Almost surely, 2^11643765457 is an apocalyptic number.

It is an amenable number.

11643765457 is a deficient number, since it is larger than the sum of its proper divisors (1).

11643765457 is an equidigital number, since it uses as much as digits as its factorization.

11643765457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 49.

The spelling of 11643765457 in words is "eleven billion, six hundred forty-three million, seven hundred sixty-five thousand, four hundred fifty-seven".