11953835911 has 4 divisors (see below), whose sum is σ = 12072190824. Its totient is φ = 11835481000.

The previous prime is 11953835867. The next prime is 11953835947.

11953835911 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11953835911 - 2¹¹ = 11953833863 is a prime.

It is a super-2 number, since 2×11953835911² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11953835981) 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, 59177305 + ... + 59177506.

It is an arithmetic number, because the mean of its divisors is an integer number (3018047706).

Almost surely, 2^11953835911 is an apocalyptic number.

11953835911 is a deficient number, since it is larger than the sum of its proper divisors (118354913).

11953835911 is a wasteful number, since it uses less digits than its factorization.

11953835911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118354912.

The product of its digits is 145800, while the sum is 46.

The spelling of 11953835911 in words is "eleven billion, nine hundred fifty-three million, eight hundred thirty-five thousand, nine hundred eleven".