168994988100 has 243 divisors, whose sum is σ = 540069332439. Its totient is φ = 44200396800.

The previous prime is 168994988089. The next prime is 168994988111. The reversal of 168994988100 is 1889499861.

The square root of 168994988100 is 411090.

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

168994988100 is a `hidden beast` number, since 1 + 68 + 9 + 9 + 498 + 81 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (168994988089) and next prime (168994988111).

It can be written as a sum of positive squares in 4 ways, for example, as 27179479044 + 141815509056 = 164862^2 + 376584^2 .

It is a super-2 number, since 2×168994988100² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 875621604 + ... + 875621796.

Almost surely, 2^168994988100 is an apocalyptic number.

168994988100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168994988100 is the 411090-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168994988100

168994988100 is an abundant number, since it is smaller than the sum of its proper divisors (371074344339).

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

168994988100 is a wasteful number, since it uses less digits than its factorization.

168994988100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 168994988100 in words is "one hundred sixty-eight billion, nine hundred ninety-four million, nine hundred eighty-eight thousand, one hundred".