11365478897 has 2 divisors, whose sum is σ = 11365478898. Its totient is φ = 11365478896.

The previous prime is 11365478833. The next prime is 11365478899. The reversal of 11365478897 is 79887456311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11365478881 + 16 = 106609^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 11365478897 - 2⁶ = 11365478833 is a prime.

It is a super-2 number, since 2×11365478897² (a number of 21 digits) contains 22 as substring.

Together with 11365478899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11365478899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5682739448 + 5682739449.

It is an arithmetic number, because the mean of its divisors is an integer number (5682739449).

Almost surely, 2^11365478897 is an apocalyptic number.

It is an amenable number.

11365478897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11365478897 is an equidigital number, since it uses as much as digits as its factorization.

11365478897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 59.

The spelling of 11365478897 in words is "eleven billion, three hundred sixty-five million, four hundred seventy-eight thousand, eight hundred ninety-seven".