11312278447 has 4 divisors (see below), whose sum is σ = 11504012040. Its totient is φ = 11120544856.

The previous prime is 11312278441. The next prime is 11312278469. The reversal of 11312278447 is 74487221311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74487221311 = 19 ⋅3920380069.

It is a cyclic number.

It is not a de Polignac number, because 11312278447 - 2¹¹ = 11312276399 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 (11312278441) 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, 95866708 + ... + 95866825.

It is an arithmetic number, because the mean of its divisors is an integer number (2876003010).

Almost surely, 2^11312278447 is an apocalyptic number.

11312278447 is a deficient number, since it is larger than the sum of its proper divisors (191733593).

11312278447 is an equidigital number, since it uses as much as digits as its factorization.

11312278447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191733592.

The product of its digits is 75264, while the sum is 40.

Adding to 11312278447 its reverse (74487221311), we get a palindrome (85799499758).

The spelling of 11312278447 in words is "eleven billion, three hundred twelve million, two hundred seventy-eight thousand, four hundred forty-seven".