11805651194 has 4 divisors (see below), whose sum is σ = 17708476794. Its totient is φ = 5902825596.

The previous prime is 11805651191. The next prime is 11805651199. The reversal of 11805651194 is 49115650811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49115650811 = 919 ⋅53444669.

It can be written as a sum of positive squares in only one way, i.e., 6081972169 + 5723679025 = 77987^2 + 75655^2 .

It is a super-2 number, since 2×11805651194² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (11805651191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2951412797 + ... + 2951412800.

Almost surely, 2^11805651194 is an apocalyptic number.

11805651194 is a deficient number, since it is larger than the sum of its proper divisors (5902825600).

11805651194 is an equidigital number, since it uses as much as digits as its factorization.

11805651194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902825599.

The product of its (nonzero) digits is 43200, while the sum is 41.

The spelling of 11805651194 in words is "eleven billion, eight hundred five million, six hundred fifty-one thousand, one hundred ninety-four".