11856356284428 has 72 divisors (see below), whose sum is σ = 31548309112320. Its totient is φ = 3744030094560.

The previous prime is 11856356284427. The next prime is 11856356284439. The reversal of 11856356284428 is 82448265365811.

It is a happy number.

11856356284428 is a `hidden beast` number, since 1 + 1 + 8 + 5 + 6 + 3 + 562 + 8 + 44 + 28 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11856356284427) 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 23 ways as a sum of consecutive naturals, for example, 35889901 + ... + 36218747.

Almost surely, 2^{11856356284428} is an apocalyptic number.

11856356284428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11856356284428 is an abundant number, since it is smaller than the sum of its proper divisors (19691952827892).

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

11856356284428 is a wasteful number, since it uses less digits than its factorization.

11856356284428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381587 (or 381582 counting only the distinct ones).

The product of its digits is 88473600, while the sum is 63.

The spelling of 11856356284428 in words is "eleven trillion, eight hundred fifty-six billion, three hundred fifty-six million, two hundred eighty-four thousand, four hundred twenty-eight".