55211840784 has 225 divisors, whose sum is σ = 163994211381. Its totient is φ = 17933063040.

The previous prime is 55211840777. The next prime is 55211840809. The reversal of 55211840784 is 48704811255.

The square root of 55211840784 is 234972.

It is a perfect power (a square), and thus also a powerful number.

55211840784 is a `hidden beast` number, since 5 + 52 + 118 + 407 + 84 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1795386384 + 53416454400 = 42372^2 + 231120^2 .

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 515998459 + ... + 515998565.

Almost surely, 2^55211840784 is an apocalyptic number.

55211840784 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

55211840784 is the 234972-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55211840784

55211840784 is an abundant number, since it is smaller than the sum of its proper divisors (108782370597).

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

55211840784 is an equidigital number, since it uses as much as digits as its factorization.

55211840784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The spelling of 55211840784 in words is "fifty-five billion, two hundred eleven million, eight hundred forty thousand, seven hundred eighty-four".