1915774333225 has 9 divisors (see below), whose sum is σ = 2375568754743. Its totient is φ = 1532613930120.

The previous prime is 1915774333223. The next prime is 1915774333283. The reversal of 1915774333225 is 5223334775191.

The square root of 1915774333225 is 1384115.

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

It can be written as a sum of positive squares in only one way, i.e., 689678759961 + 1226095573264 = 830469^2 + 1107292^2 .

It is not a de Polignac number, because 1915774333225 - 2¹ = 1915774333223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1915774333223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6782164 + ... + 7058986.

Almost surely, 2^{1915774333225} is an apocalyptic number.

1915774333225 is the 1384115-th square number.

1915774333225 is the 692058-th centered octagonal number.

It is an amenable number.

1915774333225 is a deficient number, since it is larger than the sum of its proper divisors (459794421518).

1915774333225 is an frugal number, since it uses more digits than its factorization.

1915774333225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553656 (or 276828 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 52.

The spelling of 1915774333225 in words is "one trillion, nine hundred fifteen billion, seven hundred seventy-four million, three hundred thirty-three thousand, two hundred twenty-five".