16510194064 has 135 divisors (see below), whose sum is σ = 40408160643. Its totient is φ = 6513002496.

The previous prime is 16510194061. The next prime is 16510194067. The reversal of 16510194064 is 46049101561.

The square root of 16510194064 is 128492.

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

It is an interprime number because it is at equal distance from previous prime (16510194061) and next prime (16510194067).

It can be written as a sum of positive squares in 4 ways, for example, as 3587051664 + 12923142400 = 59892^2 + 113680^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16510194061) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 46770912 + ... + 46771264.

Almost surely, 2^16510194064 is an apocalyptic number.

16510194064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16510194064 is the 128492-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16510194064

16510194064 is an abundant number, since it is smaller than the sum of its proper divisors (23897966579).

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

16510194064 is an equidigital number, since it uses as much as digits as its factorization.

16510194064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 16510194064 in words is "sixteen billion, five hundred ten million, one hundred ninety-four thousand, sixty-four".