11951984353 has 4 divisors (see below), whose sum is σ = 11952888580. Its totient is φ = 11951080128.

The previous prime is 11951984263. The next prime is 11951984383. The reversal of 11951984353 is 35348915911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35348915911 = 727 ⋅48622993.

It can be written as a sum of positive squares in 2 ways, for example, as 5671897344 + 6280087009 = 75312^2 + 79247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11951984353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11951984297 and 11951984306.

It is not an unprimeable number, because it can be changed into a prime (11951984383) 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, 431988 + ... + 458821.

It is an arithmetic number, because the mean of its divisors is an integer number (2988222145).

Almost surely, 2^11951984353 is an apocalyptic number.

It is an amenable number.

11951984353 is a deficient number, since it is larger than the sum of its proper divisors (904227).

11951984353 is an equidigital number, since it uses as much as digits as its factorization.

11951984353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904226.

The product of its digits is 583200, while the sum is 49.

The spelling of 11951984353 in words is "eleven billion, nine hundred fifty-one million, nine hundred eighty-four thousand, three hundred fifty-three".