11621831563782 has 120 divisors (see below), whose sum is σ = 28629402197088. Its totient is φ = 3521119805280.

The previous prime is 11621831563781. The next prime is 11621831563789. The reversal of 11621831563782 is 28736513812611.

11621831563782 is a `hidden beast` number, since 1 + 1 + 6 + 2 + 1 + 8 + 3 + 1 + 563 + 78 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621831563781) 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 59 ways as a sum of consecutive naturals, for example, 112522668 + ... + 112625904.

Almost surely, 2^{11621831563782} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11621831563782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14314701098544).

11621831563782 is an abundant number, since it is smaller than the sum of its proper divisors (17007570633306).

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

11621831563782 is a wasteful number, since it uses less digits than its factorization.

11621831563782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109016 (or 108996 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 11621831563782 in words is "eleven trillion, six hundred twenty-one billion, eight hundred thirty-one million, five hundred sixty-three thousand, seven hundred eighty-two".