55168945650 has 216 divisors, whose sum is σ = 185683873284. Its totient is φ = 11639980800.

The previous prime is 55168945631. The next prime is 55168945723. The reversal of 55168945650 is 5654986155.

55168945650 is a `hidden beast` number, since 5 + 516 + 89 + 45 + 6 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 14585634441 + 40583311209 = 120771^2 + 201453^2 .

It is a super-2 number, since 2×55168945650² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 107 ways as a sum of consecutive naturals, for example, 190420 + ... + 382880.

Almost surely, 2^55168945650 is an apocalyptic number.

55168945650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55168945650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92841936642).

55168945650 is an abundant number, since it is smaller than the sum of its proper divisors (130514927634).

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

55168945650 is a wasteful number, since it uses less digits than its factorization.

55168945650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192506 (or 192491 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 55168945650 in words is "fifty-five billion, one hundred sixty-eight million, nine hundred forty-five thousand, six hundred fifty".