11408645809 has 12 divisors (see below), whose sum is σ = 12546192708. Its totient is φ = 10366442240.

The previous prime is 11408645783. The next prime is 11408645813. The reversal of 11408645809 is 90854680411.

It can be written as a sum of positive squares in 2 ways, for example, as 6017415184 + 5391230625 = 77572^2 + 73425^2 .

It is not a de Polignac number, because 11408645809 - 2⁵ = 11408645777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11408645869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238617 + ... + 282409.

It is an arithmetic number, because the mean of its divisors is an integer number (1045516059).

Almost surely, 2^11408645809 is an apocalyptic number.

It is an amenable number.

11408645809 is a deficient number, since it is larger than the sum of its proper divisors (1137546899).

11408645809 is a wasteful number, since it uses less digits than its factorization.

11408645809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45968 (or 45957 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

It can be divided in two parts, 114086 and 45809, that added together give a triangular number (159895 = T₅₆₅).

The spelling of 11408645809 in words is "eleven billion, four hundred eight million, six hundred forty-five thousand, eight hundred nine".