1847791642225 has 9 divisors (see below), whose sum is σ = 2291270064267. Its totient is φ = 1478227876440.

The previous prime is 1847791642211. The next prime is 1847791642253. The reversal of 1847791642225 is 5222461977481.

The square root of 1847791642225 is 1359335.

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., 665204991201 + 1182586651024 = 815601^2 + 1087468^2 .

It is not a de Polignac number, because 1847791642225 - 2⁷ = 1847791642097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1847791642225.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6660742 + ... + 6932608.

Almost surely, 2^{1847791642225} is an apocalyptic number.

1847791642225 is the 1359335-th square number.

1847791642225 is the 679668-th centered octagonal number.

It is an amenable number.

1847791642225 is a deficient number, since it is larger than the sum of its proper divisors (443478422042).

1847791642225 is an frugal number, since it uses more digits than its factorization.

1847791642225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543744 (or 271872 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 58.

The spelling of 1847791642225 in words is "one trillion, eight hundred forty-seven billion, seven hundred ninety-one million, six hundred forty-two thousand, two hundred twenty-five".