11471590549 has 4 divisors (see below), whose sum is σ = 11531029036. Its totient is φ = 11412152064.

The previous prime is 11471590513. The next prime is 11471590573. The reversal of 11471590549 is 94509517411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94509517411 = 61 ⋅1549336351.

It can be written as a sum of positive squares in 2 ways, for example, as 974563524 + 10497027025 = 31218^2 + 102455^2 .

It is a cyclic number.

It is not a de Polignac number, because 11471590549 - 2¹¹ = 11471588501 is a prime.

It is a super-2 number, since 2×11471590549² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11471590499 and 11471590508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11471590049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29718954 + ... + 29719339.

It is an arithmetic number, because the mean of its divisors is an integer number (2882757259).

Almost surely, 2^11471590549 is an apocalyptic number.

It is an amenable number.

11471590549 is a deficient number, since it is larger than the sum of its proper divisors (59438487).

11471590549 is an equidigital number, since it uses as much as digits as its factorization.

11471590549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59438486.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 11471590549 in words is "eleven billion, four hundred seventy-one million, five hundred ninety thousand, five hundred forty-nine".