11800078081 has 8 divisors (see below), whose sum is σ = 12954806784. Its totient is φ = 10659015120.

The previous prime is 11800078061. The next prime is 11800078187. The reversal of 11800078081 is 18087000811.

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 11800078081 - 2⁷ = 11800077953 is a prime.

It is a super-2 number, since 2×11800078081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11800078061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3414625 + ... + 3418078.

It is an arithmetic number, because the mean of its divisors is an integer number (1619350848).

Almost surely, 2^11800078081 is an apocalyptic number.

11800078081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11800078081 is a deficient number, since it is larger than the sum of its proper divisors (1154728703).

11800078081 is a wasteful number, since it uses less digits than its factorization.

11800078081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832871.

The product of its (nonzero) digits is 3584, while the sum is 34.

Adding to 11800078081 its reverse (18087000811), we get a palindrome (29887078892).

The spelling of 11800078081 in words is "eleven billion, eight hundred million, seventy-eight thousand, eighty-one".