11798755861 has 4 divisors (see below), whose sum is σ = 11800453932. Its totient is φ = 11797057792.

The previous prime is 11798755807. The next prime is 11798755919. The reversal of 11798755861 is 16855789711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4540738225 + 7258017636 = 67385^2 + 85194^2 .

It is a cyclic number.

It is not a de Polignac number, because 11798755861 - 2⁷ = 11798755733 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11798755796 and 11798755805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11798755061) 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, 838570 + ... + 852523.

It is an arithmetic number, because the mean of its divisors is an integer number (2950113483).

Almost surely, 2^11798755861 is an apocalyptic number.

It is an amenable number.

11798755861 is a deficient number, since it is larger than the sum of its proper divisors (1698071).

11798755861 is an equidigital number, since it uses as much as digits as its factorization.

11798755861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698070.

The product of its digits is 4233600, while the sum is 58.

The spelling of 11798755861 in words is "eleven billion, seven hundred ninety-eight million, seven hundred fifty-five thousand, eight hundred sixty-one".