11550320247 has 4 divisors (see below), whose sum is σ = 15400427000. Its totient is φ = 7700213496.

The previous prime is 11550320233. The next prime is 11550320279. The reversal of 11550320247 is 74202305511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74202305511 = 3 ⋅24734101837.

It is not a de Polignac number, because 11550320247 - 2¹⁸ = 11550058103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550320227) 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, 1925053372 + ... + 1925053377.

It is an arithmetic number, because the mean of its divisors is an integer number (3850106750).

Almost surely, 2^11550320247 is an apocalyptic number.

11550320247 is a deficient number, since it is larger than the sum of its proper divisors (3850106753).

11550320247 is an equidigital number, since it uses as much as digits as its factorization.

11550320247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850106752.

The product of its (nonzero) digits is 8400, while the sum is 30.

Adding to 11550320247 its reverse (74202305511), we get a palindrome (85752625758).

The spelling of 11550320247 in words is "eleven billion, five hundred fifty million, three hundred twenty thousand, two hundred forty-seven".