1860536920225 has 81 divisors (see below), whose sum is σ = 2503887054123. Its totient is φ = 1371260647680.

The previous prime is 1860536920223. The next prime is 1860536920237. The reversal of 1860536920225 is 5220296350681.

The square root of 1860536920225 is 1364015.

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

It can be written as a sum of positive squares in 13 ways, for example, as 302853203041 + 1557683717184 = 550321^2 + 1248072^2 .

It is not a de Polignac number, because 1860536920225 - 2¹ = 1860536920223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1860536920223) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4548989821 + ... + 4548990229.

Almost surely, 2^{1860536920225} is an apocalyptic number.

1860536920225 is the 1364015-th square number.

1860536920225 is the 682008-th centered octagonal number.

It is an amenable number.

1860536920225 is a deficient number, since it is larger than the sum of its proper divisors (643350133898).

1860536920225 is an frugal number, since it uses more digits than its factorization.

1860536920225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

Multiplying 1860536920225 by its sum of digits (49), we get a square (91166309091025 = 9548105²).

The spelling of 1860536920225 in words is "one trillion, eight hundred sixty billion, five hundred thirty-six million, nine hundred twenty thousand, two hundred twenty-five".