55646178336 has 480 divisors, whose sum is σ = 199168865280. Its totient is φ = 14878162944.

The previous prime is 55646178331. The next prime is 55646178337. The reversal of 55646178336 is 63387164655.

55646178336 is a `hidden beast` number, since 5 + 564 + 6 + 1 + 78 + 3 + 3 + 6 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (55646178331) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 68783500 + ... + 68784308.

It is an arithmetic number, because the mean of its divisors is an integer number (414935136).

Almost surely, 2^55646178336 is an apocalyptic number.

55646178336 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55646178336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99584432640).

55646178336 is an abundant number, since it is smaller than the sum of its proper divisors (143522686944).

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

55646178336 is a wasteful number, since it uses less digits than its factorization.

55646178336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1061 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 55646178336 in words is "fifty-five billion, six hundred forty-six million, one hundred seventy-eight thousand, three hundred thirty-six".