55788771384 has 320 divisors, whose sum is σ = 167477919840. Its totient is φ = 17322439680.

The previous prime is 55788771383. The next prime is 55788771433. The reversal of 55788771384 is 48317788755.

55788771384 is a `hidden beast` number, since 557 + 8 + 8 + 7 + 71 + 3 + 8 + 4 = 666.

It is a super-2 number, since 2×55788771384² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55788771383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 54640794 + ... + 54641814.

Almost surely, 2^55788771384 is an apocalyptic number.

55788771384 is a gapful number since it is divisible by the number (54) 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 55788771384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83738959920).

55788771384 is an abundant number, since it is smaller than the sum of its proper divisors (111689148456).

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

55788771384 is a wasteful number, since it uses less digits than its factorization.

55788771384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1159 counting only the distinct ones).

The product of its digits is 52684800, while the sum is 63.

The spelling of 55788771384 in words is "fifty-five billion, seven hundred eighty-eight million, seven hundred seventy-one thousand, three hundred eighty-four".