16395522025 has 9 divisors (see below), whose sum is σ = 20331241221. Its totient is φ = 13115905440.

The previous prime is 16395522023. The next prime is 16395522037. The reversal of 16395522025 is 52022559361.

The square root of 16395522025 is 128045.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5319222489 + 11076299536 = 72933^2 + 105244^2 .

It is not a de Polignac number, because 16395522025 - 2¹ = 16395522023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16395522023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 627421 + ... + 653029.

Almost surely, 2^16395522025 is an apocalyptic number.

16395522025 is the 128045-th square number.

16395522025 is the 64023-rd centered octagonal number.

It is an amenable number.

16395522025 is a deficient number, since it is larger than the sum of its proper divisors (3935719196).

16395522025 is an frugal number, since it uses more digits than its factorization.

16395522025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51228 (or 25614 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 16395522025 in words is "sixteen billion, three hundred ninety-five million, five hundred twenty-two thousand, twenty-five".