65894890000 has 225 divisors, whose sum is σ = 170604530481. Its totient is φ = 24643200000.

The previous prime is 65894889997. The next prime is 65894890013. The reversal of 65894890000 is 9849856.

It is a happy number.

The square root of 65894890000 is 256700.

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

It can be written as a sum of positive squares in 7 ways, for example, as 32180054544 + 33714835456 = 179388^2 + 183616^2 .

It is a super-2 number, since 2×65894890000² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 436389925 + ... + 436390075.

Almost surely, 2^65894890000 is an apocalyptic number.

65894890000 is the 256700-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65894890000

65894890000 is an abundant number, since it is smaller than the sum of its proper divisors (104709640481).

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

65894890000 is an equidigital number, since it uses as much as digits as its factorization.

65894890000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

Multiplying 65894890000 by its sum of digits (49), we get a square (3228849610000 = 1796900²).

The spelling of 65894890000 in words is "sixty-five billion, eight hundred ninety-four million, eight hundred ninety thousand".