11143439961 has 8 divisors (see below), whose sum is σ = 15259485504. Its totient is φ = 7228177200.

The previous prime is 11143439953. The next prime is 11143439971. The reversal of 11143439961 is 16993434111.

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

It is not a de Polignac number, because 11143439961 - 2³ = 11143439953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11143439971) 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, 50195565 + ... + 50195786.

It is an arithmetic number, because the mean of its divisors is an integer number (1907435688).

Almost surely, 2^11143439961 is an apocalyptic number.

It is an amenable number.

11143439961 is a deficient number, since it is larger than the sum of its proper divisors (4116045543).

11143439961 is a wasteful number, since it uses less digits than its factorization.

11143439961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100391391.

The product of its digits is 69984, while the sum is 42.

The spelling of 11143439961 in words is "eleven billion, one hundred forty-three million, four hundred thirty-nine thousand, nine hundred sixty-one".