11475864809 has 2 divisors, whose sum is σ = 11475864810. Its totient is φ = 11475864808.

The previous prime is 11475864779. The next prime is 11475864847. The reversal of 11475864809 is 90846857411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8118010000 + 3357854809 = 90100^2 + 57947^2 .

It is a cyclic number.

It is not a de Polignac number, because 11475864809 - 2¹² = 11475860713 is a prime.

It is a super-2 number, since 2×11475864809² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11475864889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5737932404 + 5737932405.

It is an arithmetic number, because the mean of its divisors is an integer number (5737932405).

Almost surely, 2^11475864809 is an apocalyptic number.

It is an amenable number.

11475864809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11475864809 is an equidigital number, since it uses as much as digits as its factorization.

11475864809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 11475864809 in words is "eleven billion, four hundred seventy-five million, eight hundred sixty-four thousand, eight hundred nine".