12631440247 has 8 divisors (see below), whose sum is σ = 12660972192. Its totient is φ = 12601929600.

The previous prime is 12631440229. The next prime is 12631440277. The reversal of 12631440247 is 74204413621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12631440247 - 2³¹ = 10483956599 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 (12631440277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2018878 + ... + 2025124.

It is an arithmetic number, because the mean of its divisors is an integer number (1582621524).

Almost surely, 2^12631440247 is an apocalyptic number.

12631440247 is a deficient number, since it is larger than the sum of its proper divisors (29531945).

12631440247 is an equidigital number, since it uses as much as digits as its factorization.

12631440247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10649.

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 12631440247 its reverse (74204413621), we get a palindrome (86835853868).

The spelling of 12631440247 in words is "twelve billion, six hundred thirty-one million, four hundred forty thousand, two hundred forty-seven".