11951957911 has 8 divisors (see below), whose sum is σ = 11988848000. Its totient is φ = 11915096760.

The previous prime is 11951957909. The next prime is 11951957921. The reversal of 11951957911 is 11975915911.

11951957911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11951957911 - 2¹ = 11951957909 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 (11951957921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052140 + ... + 1063438.

It is an arithmetic number, because the mean of its divisors is an integer number (1498606000).

Almost surely, 2^11951957911 is an apocalyptic number.

11951957911 is a deficient number, since it is larger than the sum of its proper divisors (36890089).

11951957911 is a wasteful number, since it uses less digits than its factorization.

11951957911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14469.

The product of its digits is 127575, while the sum is 49.

The spelling of 11951957911 in words is "eleven billion, nine hundred fifty-one million, nine hundred fifty-seven thousand, nine hundred eleven".