16940324025 has 27 divisors (see below), whose sum is σ = 30345499821. Its totient is φ = 9033798240.

The previous prime is 16940324017. The next prime is 16940324111. The reversal of 16940324025 is 52042304961.

It is a happy number.

The square root of 16940324025 is 130155.

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

16940324025 is a `hidden beast` number, since 1 + 6 + 9 + 403 + 240 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2442237561 + 14498086464 = 49419^2 + 120408^2 .

It is not a de Polignac number, because 16940324025 - 2³ = 16940324017 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1947987 + ... + 1956663.

Almost surely, 2^16940324025 is an apocalyptic number.

16940324025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16940324025 is the 130155-th square number.

16940324025 is the 65078-th centered octagonal number.

It is an amenable number.

16940324025 is a deficient number, since it is larger than the sum of its proper divisors (13405175796).

16940324025 is an frugal number, since it uses more digits than its factorization.

16940324025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17370 (or 8685 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Multiplying 16940324025 by its sum of digits (36), we get a square (609851664900 = 780930²).

Adding to 16940324025 its reverse (52042304961), we get a palindrome (68982628986).

The spelling of 16940324025 in words is "sixteen billion, nine hundred forty million, three hundred twenty-four thousand, twenty-five".