11835653811 has 4 divisors (see below), whose sum is σ = 15780871752. Its totient is φ = 7890435872.

The previous prime is 11835653807. The next prime is 11835653813.

It is a happy number.

11835653811 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 11835653811 - 2² = 11835653807 is a prime.

It is a super-2 number, since 2×11835653811² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11835653813) 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, 1972608966 + ... + 1972608971.

It is an arithmetic number, because the mean of its divisors is an integer number (3945217938).

Almost surely, 2^11835653811 is an apocalyptic number.

11835653811 is a deficient number, since it is larger than the sum of its proper divisors (3945217941).

11835653811 is an equidigital number, since it uses as much as digits as its factorization.

11835653811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945217940.

The product of its digits is 86400, while the sum is 42.

The spelling of 11835653811 in words is "eleven billion, eight hundred thirty-five million, six hundred fifty-three thousand, eight hundred eleven".