11956497243 has 8 divisors (see below), whose sum is σ = 15950635008. Its totient is φ = 7966678824.

The previous prime is 11956497227. The next prime is 11956497263. The reversal of 11956497243 is 34279465911.

It is a happy number.

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

It is not a de Polignac number, because 11956497243 - 2⁴ = 11956497227 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11956497263) 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, 1073371 + ... + 1084452.

It is an arithmetic number, because the mean of its divisors is an integer number (1993829376).

Almost surely, 2^11956497243 is an apocalyptic number.

11956497243 is a deficient number, since it is larger than the sum of its proper divisors (3994137765).

11956497243 is a wasteful number, since it uses less digits than its factorization.

11956497243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159673.

The product of its digits is 1632960, while the sum is 51.

The spelling of 11956497243 in words is "eleven billion, nine hundred fifty-six million, four hundred ninety-seven thousand, two hundred forty-three".