11961359443 has 24 divisors (see below), whose sum is σ = 13887633744. Its totient is φ = 10215014400.

The previous prime is 11961359437. The next prime is 11961359483. The reversal of 11961359443 is 34495316911.

It is not a de Polignac number, because 11961359443 - 2⁵ = 11961359411 is a prime.

It is a super-3 number, since 3×11961359443³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11961359393 and 11961359402.

It is not an unprimeable number, because it can be changed into a prime (11961359483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1831023 + ... + 1837543.

It is an arithmetic number, because the mean of its divisors is an integer number (578651406).

Almost surely, 2^11961359443 is an apocalyptic number.

11961359443 is a deficient number, since it is larger than the sum of its proper divisors (1926274301).

11961359443 is a wasteful number, since it uses less digits than its factorization.

11961359443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143 (or 7126 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The spelling of 11961359443 in words is "eleven billion, nine hundred sixty-one million, three hundred fifty-nine thousand, four hundred forty-three".