11609800781 has 8 divisors (see below), whose sum is σ = 12396310080. Its totient is φ = 10846769472.

The previous prime is 11609800759. The next prime is 11609800799. The reversal of 11609800781 is 18700890611.

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 11609800781 - 2¹⁸ = 11609538637 is a prime.

It is a super-2 number, since 2×11609800781² (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 (11609800721) 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, 5868476 + ... + 5870453.

It is an arithmetic number, because the mean of its divisors is an integer number (1549538760).

Almost surely, 2^11609800781 is an apocalyptic number.

It is an amenable number.

11609800781 is a deficient number, since it is larger than the sum of its proper divisors (786509299).

11609800781 is a wasteful number, since it uses less digits than its factorization.

11609800781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11738995.

The product of its (nonzero) digits is 24192, while the sum is 41.

The spelling of 11609800781 in words is "eleven billion, six hundred nine million, eight hundred thousand, seven hundred eighty-one".