19167015340225 has 27 divisors (see below), whose sum is σ = 24002911372809. Its totient is φ = 15182956020000.

The previous prime is 19167015340223. The next prime is 19167015340241. The reversal of 19167015340225 is 52204351076191.

The square root of 19167015340225 is 4378015.

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 6740882735041 + 12426132605184 = 2596321^2 + 3525072^2 .

It is not a de Polignac number, because 19167015340225 - 2¹ = 19167015340223 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19167015340223) 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, 2254673475 + ... + 2254681975.

Almost surely, 2^{19167015340225} is an apocalyptic number.

19167015340225 is the 4378015-th square number.

19167015340225 is the 2189008-th centered octagonal number.

It is an amenable number.

19167015340225 is a deficient number, since it is larger than the sum of its proper divisors (4835896032584).

19167015340225 is an frugal number, since it uses more digits than its factorization.

19167015340225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218 (or 8609 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 19167015340225 in words is "nineteen trillion, one hundred sixty-seven billion, fifteen million, three hundred forty thousand, two hundred twenty-five".