11478364649 has 2 divisors, whose sum is σ = 11478364650. Its totient is φ = 11478364648.

The previous prime is 11478364643. The next prime is 11478364663. The reversal of 11478364649 is 94646387411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10227681424 + 1250683225 = 101132^2 + 35365^2 .

It is a cyclic number.

It is not a de Polignac number, because 11478364649 - 2¹⁶ = 11478299113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11478364649.

It is not a weakly prime, because it can be changed into another prime (11478364643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5739182324 + 5739182325.

It is an arithmetic number, because the mean of its divisors is an integer number (5739182325).

Almost surely, 2^11478364649 is an apocalyptic number.

It is an amenable number.

11478364649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11478364649 is an equidigital number, since it uses as much as digits as its factorization.

11478364649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The spelling of 11478364649 in words is "eleven billion, four hundred seventy-eight million, three hundred sixty-four thousand, six hundred forty-nine".