56381455836 has 288 divisors, whose sum is σ = 158931601920. Its totient is φ = 17426016000.

The previous prime is 56381455813. The next prime is 56381455853. The reversal of 56381455836 is 63855418365.

It is a happy number.

56381455836 is a `hidden beast` number, since 5 + 6 + 3 + 81 + 4 + 558 + 3 + 6 = 666.

56381455836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 311499666 + ... + 311499846.

It is an arithmetic number, because the mean of its divisors is an integer number (551845840).

Almost surely, 2^56381455836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56381455836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79465800960).

56381455836 is an abundant number, since it is smaller than the sum of its proper divisors (102550146084).

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

56381455836 is a wasteful number, since it uses less digits than its factorization.

56381455836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 473 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 54.

The spelling of 56381455836 in words is "fifty-six billion, three hundred eighty-one million, four hundred fifty-five thousand, eight hundred thirty-six".