11997840801 has 16 divisors (see below), whose sum is σ = 16155374400. Its totient is φ = 7919708160.

The previous prime is 11997840787. The next prime is 11997840847. The reversal of 11997840801 is 10804879911.

It is not a de Polignac number, because 11997840801 - 2⁹ = 11997840289 is a prime.

It is a super-2 number, since 2×11997840801² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11997840851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142461 + ... + 210453.

It is an arithmetic number, because the mean of its divisors is an integer number (1009710900).

Almost surely, 2^11997840801 is an apocalyptic number.

It is an amenable number.

11997840801 is a deficient number, since it is larger than the sum of its proper divisors (4157533599).

11997840801 is a wasteful number, since it uses less digits than its factorization.

11997840801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68576.

The product of its (nonzero) digits is 145152, while the sum is 48.

The spelling of 11997840801 in words is "eleven billion, nine hundred ninety-seven million, eight hundred forty thousand, eight hundred one".