11778191235820 has 24 divisors (see below), whose sum is σ = 25402693531824. Its totient is φ = 4583944696896.

The previous prime is 11778191235791. The next prime is 11778191235821. The reversal of 11778191235820 is 2853219187711.

It is not an unprimeable number, because it can be changed into a prime (11778191235821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7958236582 + ... + 7958238061.

It is an arithmetic number, because the mean of its divisors is an integer number (1058445563826).

Almost surely, 2^{11778191235820} is an apocalyptic number.

11778191235820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11778191235820 is an abundant number, since it is smaller than the sum of its proper divisors (13624502296004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11778191235820 is a wasteful number, since it uses less digits than its factorization.

11778191235820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916474689 (or 15916474687 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 55.

The spelling of 11778191235820 in words is "eleven trillion, seven hundred seventy-eight billion, one hundred ninety-one million, two hundred thirty-five thousand, eight hundred twenty".